Sunday

March 1, 2015

March 1, 2015

Number of results: 12,910

**Physics**

There are two conducting concentric hollow spheres of outer radii R2 and R1 ( R2>R1 ). The thickness of the material of both spheres is d . The inner sphere is negatively charged with charge density -σ1, . The larger sphere is positively charged with charge density +&#...
*February 27, 2013 by Anonymous*

**math**

An airplane travels with a speed of 145 mph in calm air. the wind is blowing with a velocity of 23 mph from N72degreesE. If the plane is headed in a direction N63W, find the magnitude of the speed and the direction of the airplane with reference to the ground. In what ...
*February 24, 2015 by Dan*

**Physics**

The helicopter view in the figure below shows two people pulling on a stubborn mule. Assume that F1 is 130 N, and F2 is 65 N. The forces are measured in units of newtons (N). (a) Find the single force that is equivalent to the two forces shown. In both magnitude and direction...
*May 18, 2011 by anne*

**physics 213**

A duck has a mass of 2.80 kg. As the duck paddles, a force of 0.120 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.190 N in a direction of 48.0 ° south of east. When these forces begin to act, the velocity of the duck is 0.120 m...
*February 3, 2012 by Erin*

**AP physics**

A 0.278-kg volleyball approaches a player horizontally with a speed of 16.2 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.4 m/s. (a) What impulse is delivered to the ball by the player? (Take the ...
*February 22, 2015 by alba*

**Physics**

partscoretotalsubmissions1--10/12--10/13--10/14--10/1----4--The tail of a vector is fixed to the origin of an x, y axis system. Originally the vector points along the +x axis. As time passes, the vector rotates counterclockwise. Describe how the sizes of the x and y components...
*May 7, 2007 by Panda*

**chemistry**

A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 152 cm and makes an angle of 125° with the positive x axis. The resultant displacement has a magnitude of 150 cm and is directed at an angle of 35.0° to the positive x axis...
*January 25, 2010 by tea*

**Physics**

An aircraft has a cruising speed of 100 m/s On a particular day, a wind is blowing from the west at 75.0 m/s If the plane is pointed due north, what would be the magnitude and direction of the velocity relative to the ground? If the pilot wishes to have a resultant direction ...
*October 16, 2013 by Niki*

**physics**

Displacement vectors A,B,and C add up to a total of zero. Vector A has a magnitude of 1550 m and a direction of 24.1° north of east. Vector B has a direction of 41.0° east of south, and vector C has a direction of 33.4° north of west. Find the magnitudes of vector B and vector C.
*October 30, 2014 by Katherine*

**physics**

Displacement vectors A, B, and C add up to a total of zero. Vector A has a magnitude of 1550 m and a direction of 22.9° north of east. Vector B has a direction of 41.0° east of south, and vector C has a direction of 35.2° north of west. Find the magnitudes of vector B and ...
*October 30, 2014 by mathew*

**Physics**

On a safari, a team of naturalists sets out toward a research station located 4.0 km away in a direction 42° north of east. After traveling in a straight line for 2.3 km, they stop and discover that they have been traveling 30° north of east, because their guide misread his ...
*September 15, 2012 by Harsh Patel*

**physics**

A charge moves a distance of 1.4 cm in the direction of a uniform electric field having a magnitude of 244 N/C. The electrical potential energy of the charge decreases by 108.3 × 10−19 J as it moves. Find the magnitude of the charge on the moving particle. The electrical...
*February 8, 2013 by EMily*

**Physics ASAP**

A proton, traveling with a velocity of 6.8 × 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 8.6 × 10-14 N and direction of due south. What are the magnitude and direction of the magnetic field causing the force? If the field is up, then enter a ...
*August 3, 2014 by Luke*

**physics-please help**

A proton, traveling with a velocity of 6.8 × 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 8.6 × 10-14 N and direction of due south. What are the magnitude and direction of the magnetic field causing the force? If the field is up, then enter a ...
*August 4, 2014 by Sara*

**college physics**

A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 140 cm and makes an angle of 130° with the positive x axis. The resultant displacement has a magnitude of 144 cm and is directed at an angle of 30.0° to the positive x axis...
*September 28, 2010 by caitlin*

**physics**

A man pushing a mop across a floor causes the map to undergo two displacements. The first has a magnitude of 200 cm and makes an angle of 120° with the positive x axis. The resultant displacement has a magnitude of 240 cm and is directed at an angle of 60.0° to the positive x ...
*September 10, 2011 by grace*

**Please Help with 2 Physics Problems???**

1) In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force FA of magnitude 207 N, and Charles pulls with force FC of ...
*February 17, 2014 by Tyler*

**physics**

A duck has a mass of 2.3 kg. As the duck paddles, a force of 0.07 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.26 N in a direction of 48° south of east. When these forces begin to act, the velocity of the duck is 0.15 m/s in a...
*September 23, 2010 by ellen*

**Physics**

A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.09 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.20 N in a direction of 47° south of east. When these forces begin to act, the velocity of the duck is 0.12 m/s in a...
*September 21, 2012 by Bob*

**Physics**

A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.09 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.20 N in a direction of 47° south of east. When these forces begin to act, the velocity of the duck is 0.12 m/s in a...
*September 21, 2012 by Bob*

**physics**

A duck has a mass of 2.2 kg. As the duck paddles, a force of 0.11 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.12 N in a direction of 50° south of east. When these forces begin to act, the velocity of the duck is 0.12 m/s in a...
*September 25, 2014 by Yiah*

**physics**

An amusement park ride consists of a car moving in a vertical circle on the end of a rigid boom of negligible mass. The combined weight of the car and riders is 5.1 kN, and the circle’s radius is 10 m. At the top of the circle, what are the (a) magnitude FB and (b) direction (...
*March 2, 2010 by beav*

**physics**

A soccer ball is kicked with an initial speed of 10.8 m/s in a direction 24.9° above the horizontal. Calculate the magnitude of its velocity 0.310 s after being kicked. What was its direction? Calculate the magnitude of its velocity 0.620 s after being kicked. What was its ...
*September 5, 2013 by Anonymous*

**physics**

A soccer ball is kicked with an initial speed of 10.8 m/s in a direction 24.9° above the horizontal. Calculate the magnitude of its velocity 0.310 s after being kicked. What was its direction? Calculate the magnitude of its velocity 0.620 s after being kicked. What was its ...
*September 5, 2013 by Anonymous*

**Physics**

A proton, traveling with a velocity of 6.8 × 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 8.6 × 10-14 N and direction of due south. What are the magnitude and direction of the magnetic field causing the force? If the field is up, then enter a ...
*August 2, 2014 by Luke*

**Physics please help**

A duck has a mass of 2.8 kg. As the duck paddles, a force of 0.05 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.15 N in a direction of 60° south of east. When these forces begin to act, the velocity of the duck is 0.12 m/s in a...
*January 21, 2012 by Sushmitha*

**Physics**

A jogger runs 145m. in a direction 20.0 degrees east of north (displacement of vector A) and then 105m. in a direction 35.0 degrees south of east (displacement of vector B). Using components, determine the magnitude and direction of the resultant vector C for these two ...
*June 22, 2012 by :)*

**physics please someone help**

Peggy drives from Cornwall to Atkins Glen in 52 min. Cornwall is 75 km from Illium in a direction 26° west of south. Atkins Glen is 27.1 km from Illium in a direction 16° south of west. Use Illium as your origin. (a) Draw the initial and final position vectors. (Do this on ...
*May 20, 2012 by Adam*

**Physics**

In wandering, a grizzly bear makes a displacement of 1588 m due west, followed by a displacement of 3390 m in a direction 38.0° north of west. What are the magnitude and the direction of the displacement needed for the bear to return to its starting point? Specify the ...
*September 17, 2009 by sandhu*

**Physics**

A 0.339 kg book rests at an angle against one side of a bookshelf. The magnitude and direction of the total force exerted on the book by the left side of the bookshelf are given by: What must the magnitude and direction of the total force exerted on the book by the bottom of ...
*October 7, 2014 by Rat*

**Physics**

Can someone please provide me with some insight on this question? A pair of scissors is being used to cut a string. Does each blade of the scissors have the same angular velocity (both magnitude and direction) at a given instant? yes no Give your reasoning. The answer is no. ...
*April 24, 2007 by Jim*

**Physics/Math**

For the vectors a = (3.9 m)i + (4.8 m)j, and b = (5.4 m)i - (2.0 m)j, give the x and y components, magnitudes, and directions of the following vector operations. (a.) a + b ______(x component) ______(y component) ______(magnitude) ______° (direction from the positive x axis) (...
*January 27, 2007 by TechnoBoi11*

**Physics **

A car travels 20.2 km due north and then 31.3 km in a direction φ = 61.2◦ west of north. Find the magnitude of the car’s resultant displacement. Then Calculate the direction of the car’s resultant displacement, measured counterclockwise from the northerly direction.
*January 28, 2013 by Aurora *

**physics**

Three forces act on a moving object. One force has a magnitude of 61.9 N and is directed due north. Another has a magnitude of 52.0 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with ...
*September 23, 2012 by Robin*

**physics**

Three forces act on a moving object. One force has a magnitude of 83.4 N and is directed due north. Another has a magnitude of 47.2 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with ...
*June 30, 2013 by landan*

**physics**

Three forces act on a moving object. One force has a magnitude of 83.4 N and is directed due north. Another has a magnitude of 47.2 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with ...
*July 12, 2013 by howard*

**physics**

Three forces act on a moving object. One force has a magnitude of 62.6 N and is directed due north. Another has a magnitude of 45.9 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with ...
*October 3, 2014 by dan*

**Physics**

Four point charges are at the corners of a square of side a as shown in the figure below. Determine the magnitude and direction of the resultant electric force on q, with ke, q, and a left in symbolic form. (Let B = 2.5q and C = 8q. Let the +x-axis be pointing to the right.) ...
*June 30, 2014 by Harley*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*January 21, 2012 by MOMO*

**physics**

The electric field at the point x = 5.00cm and y = 0 points in the positive x direction with a magnitude of 10.0 N/C. At the point x = 10.0cm and y = 0 the electric field points in the positive x direction with a magnitude of 16.0 N/C. Assume this electric field is produced by...
*January 27, 2012 by jazz*

**Physics**

Four forces are acting on an object. Force 1 has a magnitude of 5N at an angle of 70° above the +x-axis; force 2 has a magnitude of 8N at an angle of 35° above the +x-axis; force 3 has a magnitude of 4N at an angle of 20° above the -x-axis; force 4 has a magnitude of 7N at an ...
*October 10, 2014 by Sarah*

**gen physics**

Vector A has a magnitude of 71 units and points due west, while vector B has the same magnitude and points due south. Find the magnitude and direction of (a) A + B and (b) A - B . Specify the directions relative to due west.
*July 2, 2013 by ODU*

**Physics**

A 1,200-kg car is pulling a 305-kg trailer. Together, the car and trailer have an acceleration of 2.00 m/s2 in the positive x-direction. Neglecting frictional forces on the trailer, determine the following. (Indicate the direction with the sign of your answer. Take the forward...
*October 7, 2012 by Crown*

**Physics **

Vectors A and B are in the xy plane and their scalar product is 20.6 units.? If A makes a 27.8 angle with the x axis and has magnitude A= 14.8 units, and B has magnitude B= 29.0 units, what can you say about the direction of B?
*November 17, 2012 by Emma *

**physics**

The electric field at the point and points in the positive direction with a magnitude of 8.00 . At the point and the electric field points in the positive direction with a magnitude of 12.0 . Assume this electric field is produced by a single point charge. What is the charge ...
*February 16, 2010 by Adam*

**physics**

A space vehicle is coasting at a constant velocity of 20.7 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.260 m/s2 in the +x direction. After 42.0 s, the pilot ...
*October 13, 2011 by Taylor*

**Physics**

There is a very large horizontal conducting plate in the plane (consider it infinitely large). Its thickness is . The charge densities on the upper and the lower surfaces are both equal to . The goal of this problem is to find the electric field (magnitude and direction) at ...
*February 24, 2013 by P*

**physics**

A baseball (m = 145 g) traveling 20 m/s moves a fielder's glove backward 25 cm when the ball is caught. What was the average force exerted by the ball on the glove? Magnitude N Direction in the direction opposite to the ball's motion in the direction of the ball's motion ...
*February 7, 2015 by mathew*

**Physics--Current question**

Two long straight parallel wires separated by 1.00mm carrying currents in opposite directions with current equaling 10.0A each. Find the magnitude and direction of the magnetic field at Point A which = 0.50mm, Point B = 0.50mm, and Point C=0.50mm and write the directions of ...
*July 27, 2009 by MP*

**physics**

charge q1=+4.00nc is located at x=0.200m, and q2 =+5.00nc is at x=-0.300 m. what are the magnitude and directionof the net force exerted by these two charges ona negative point charge q3 = -0.600 nc placed at the origin ? I think I need to find the F of q1q3 then find the F of...
*February 14, 2013 by yanis*

**Physics**

Near the equator, the Earth's magnetic field point almost horizontally to the north and has a magnitude of B = 50 micro T. What should be the magnitude and direction for the velocity of an electron if its weight is to be exactly balanced by the magnetic force?
*November 16, 2010 by Ri*

**maths**

Two athletes are pulling on a ring. One athlete pulls with a force of 150 N in a northerly direction. The second athlete pulls with a force of 200 N in a westerly direction. Calculate the magnitude [5 marks] and direction (relative to west) [5 marks] of the resultant of these ...
*February 7, 2012 by alex*

**vectors **

The minute hand of a wall clock measures 11 cm from its tip to the axis about which it rotates. The magnitude and angle of the displacement vector of the tip are to be determined for three time intervals. What are the (a) magnitude and (b) angle from a quarter after the hour ...
*February 2, 2015 by Katie*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*January 22, 2012 by mo*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*January 22, 2012 by mo*

**physic**

The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 true or false for each question The magnitude of V3 can be -3.0 m/s The x-component of V3 can be...
*September 21, 2010 by emma*

**Physics**

A car makes a trip due north for three fourths of the time and due south one-fourth of the time. The average northward velocity has a magnitude of 27m/s, and the average southward velocity has a magnitude of 17m/s. What is the average velocity, magnitude and direction of the ...
*September 14, 2008 by DELLI*

**physics**

A 1.54 ×104 N boat experiences a force of 2 000 N from east by the ocean tide and a wind force against its sails with magnitude of 4000 N directed toward the northwest (60° N of W). Find the magnitude and the direction of the resultant acceleration
*September 18, 2013 by leslie*

**physics**

A particle revolves in a horizontal circle of radius 3.20 m. At a particular instant, its acceleration is 1.20 m/s 2 in a direction that makes an angle of 55.0º to its direction of motion. Determine its speed (a) at this moment, and (b) 1.50 s later, assuming constant ...
*February 9, 2013 by god*

**Physics**

I would really appreciate the help for this assignment. A small reasoning for the answer would be very helpful. Thank you. A sphere of mass m and radius r is attached to the rim of a disk (mass M, radius R). The disk is rotating counter-clockwise with a constant period T ...
*October 31, 2014 by Kyle*

**physics**

Two forces act on an object. The first force has a magnitude of 17.0 N and is oriented 68.0° counter-clockwise from the x axis, while the 2nd force has x- and y-components (-19.0 N, 16.5 N). Express the magnitude and direction of the net force.
*November 14, 2013 by James*

**College Physics**

Consider a rock thrown off a bridge of height 78.5 m at an angle è = 25° with respect to the horizontal as shown in Figure P4.20. The initial speed of the rock is 15.6 m/s. Find the following quantities: (a) the maximum height reached by the rock (b) the time it takes the rock...
*September 12, 2011 by HELP*

**physics **

The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 true for false The magnitude of V3 can be -3.0 m/s The x-component of V3 can be 2.0 m/s The ...
*September 21, 2010 by Anonymous*

**physics**

The velocity vector V1 has a magnitude of 3.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 2.0 m/s. The sum of the two is V3, so that V3 = V1+V2 True False The magnitude of V3 can be -3.0 m/s The x-component of V3 can be 2.0 m/s The ...
*September 22, 2010 by Anonymous*

**Physics**

The velocity vector V1 has a magnitude of 4.0 m/s and is directed along the +x-axis. The velocity vector V2 has a magnitude of 3.0 m/s. The sum of the two is V3, so that V3 = V1+V2 A. The x-component of V3 can be 3.0 m/s B. The magnitude of V3 can be 8.0 m/s C. The magnitude ...
*January 21, 2014 by Jim*

**Physics**

To give a 20-kg child a ride, two teenagers pull on a 3.6-kg sled with ropes, as indicated in the figure. Both teenagers pull with a force of 55 N at an angle of 35 ∘ relative to the forward direction, which is the direction of motion. In addition, the snow exerts a ...
*October 2, 2014 by Anonymous*

**science**

You are given three displacement vectors: with magnitude 5.0 m in the direction of 60o below the negative x-axis, vector, has an x-component of +2.5 m and a y-component of +6.0 m and vector has magnitude of 2.5 m in the negative y-axis. Find the vector so that . Calculate the ...
*July 22, 2013 by miezi*

**Physics**

A particle with mass m = 1.20g and charge q = 345ìC is traveling in the x-direction with an initial velocity of v0 = 68.0m/s. The particle passes through a constant electric field in the y-direction with magnitude |E| = 263N/C over a distance of d = 12.0m. (a) What is the ...
*January 17, 2013 by Nick*

**Physics**

The electric field at the point x=5.00 cm and y=0 points in the positive x direction with a magnitude of 10.0 N/C. At the point x=10.0 cm and the electric field points in the positive x direction with a magnitude of 16.0 N/C . Assume this electric field is produced by a single...
*January 23, 2012 by Cooper*

**Physics**

A radioactive nucleus is at rest when it spontaneously decays by emitting an electron and neutrino (as shown in the figure below ). The momentum of the electron is 8.11 x 10−19 kg·m/s and it is directed at right angles to that of the neutrino. The neutrino's momentum has...
*March 28, 2011 by Tom*

**Physics**

A radioactive nucleus is at rest when it spontaneously decays by emitting an electron and neutrino (as shown in the figure below ). The momentum of the electron is 8.11 x 10−19 kg·m/s and it is directed at right angles to that of the neutrino. The neutrino's momentum has...
*March 27, 2011 by Tom*

**Physics**

A radioactive nucleus is at rest when it spontaneously decays by emitting an electron and neutrino (as shown in the figure below ). The momentum of the electron is 8.11 x 10−19 kg·m/s and it is directed at right angles to that of the neutrino. The neutrino's momentum has...
*March 27, 2011 by Tom*

**Physics**

A mass of 9.8 kg is moving in the positive x direction at 16.6 m/s and collides in a perfectly elastic, head on collision with a mass of 12.7 kg at rest. The same mass of 9.8 kg in the positive direction at 16.6 m/s also collides with the mass of 12.7 kg at rest in an ...
*November 11, 2014 by Jeremy*

**Physics**

An elevator is initially moving upward at a speed of 11.04 m/s. The elevator experiences a constant downward acceleration of magnitude 3.84 m/s2 for 3.06 s. (a) Find the magnitude and direction of the elevator's final velocity. (b)How far did it move during the 3.06 s interval?
*February 24, 2010 by Delilah*

**phy3**

A 0.01-kg baseball traveling in a horizontal direction with a speed of 11 m/s hits a bat and is popped straight up with a speed of 15 m/s. (a) What is the change in momentum (magnitude and direction) of the baseball?
*March 17, 2012 by opp*

**physics**

the x- and y- component of an acceleration vector are 3.0 m/s^2 and 4.0 m/s^2, respectively. (a) The magnitude of the accerleration vector is (1) lets than 3.0 m.s^2, (2) between 3.0 m/s^2 and 4.0 m/s^2, (3) between 4.0 m/s^2 and 7.0 m/s^2, (4) equal to 7.0 m/s^2. (b) What are...
*September 26, 2009 by Standard C.*

**Physics(Please, please respond)**

Vector A has a magnitude of 3.0 m and direction 1o3 degrees relative to the positive x-axis. Vector B has magnitude 5.0m and direction 215 relative to the positive x-axis. For the resultant I did Rx= 3 cos 103 + 5 cos 215 Ry=3 sin 103 + 5 sin 215 Then sqrt Rx^2 + Ry^2 and got ...
*June 20, 2012 by Hannah*

**Physics**

A. Given two vectors ~F1, and ~F2. Where the magnitude of these vectors are F1= 81 N, and F2= 90 N. And where θ1= 80◦,and θ2= 22◦. The angles are measure from the positive x axis with the counterclockwise angular direction as positive. What is the ...
*February 19, 2014 by Fabricus*

**Physics**

Riding in an elevator, a man notices that he feel heavier or lighter based when the elevator speeds up or slows down. He stands on a bathroom scale in the elevator to take some measurements. Assume that his mass is 85 kg. a. What is this man’s weight while at rest? b. What ...
*February 1, 2015 by Madison *

**physics**

A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the z-direction. In the following ...
*May 14, 2011 by Sandhya*

**physics**

A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the z-direction. In the following ...
*May 15, 2011 by Sandhya*

**Physics**

At a certain time a particle had a speed of 16 m/s in the positive x direction, and 2.2 s later its speed was 30 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.2 s interval?
*January 27, 2013 by Patricia*

**Physics**

At a certain time a particle had a speed of 16 m/s in the positive x direction, and 2.2 s later its speed was 30 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.2 s interval?
*January 27, 2013 by Patricia*

**Physics**

At a certain time a particle had a speed of 17 m/s in the positive x direction, and 2.0 s later its speed was 32 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.0 s interval?
*January 28, 2013 by Rachel*

**Physics**

At a certain time a particle had a speed of 17 m/s in the positive x direction, and 2.0 s later its speed was 32 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during this 2.0 s interval?
*January 28, 2013 by Rachel*

**Physics**

The vector A -5.2 has a magnitude of 38m and points in the positive x direction. What is the x component of vector A? What is the magnitude of vector A?
*September 3, 2010 by Jayson*

**physics**

Two forces act on a 10-kg mass. The first force has a magnitude of 15 N and pushes the mass due North. The second force has a magnitude of 25 N and pushes the force due West. What is the magnitude and direction of the acceleration of the mass?
*June 27, 2013 by gale*

**Physics**

A diver of weight 730 N stands at the end of a diving board of length L = 5 m and negligible mass. The board is fixed to two pedestals separated by distance d = 1.5 m. What are the magnitude and direction of the force on the board from the left pedestal? (Include the sign. ...
*October 28, 2009 by Ray*

**Physics**

An electron that has velocity v = (3 x 105 m/s) and moves along positive x direction through the uniform magnetic field B = (0.8T) which is along the positive z direction. a. Find the force on the electron (magnitude and direction). (e = - 1.6 x 10-19 C, m=9.1 x10-31 kg) b. ...
*April 25, 2011 by asif*

**physics**

Displacement vector points due east and has a magnitude of 2.69 km. Displacement vector points due north and has a magnitude of 7.91 km. Displacement vector points due west and has a magnitude of 8.64 km. Displacement vector points due south and has a magnitude of 4.57 km. ...
*September 15, 2012 by loli09*

**Physics**

Four point charges are at the corners of a square of side a as shown in the figure below. Determine the magnitude and direction of the resultant electric force on q, with ke, q, and a left in symbolic form. (B = 4q and C = 6.5q. Let the +x-axis be pointing to the right.) F = ...
*March 30, 2013 by Sofia*

**Physics**

A basketball player runs down the court, following the path indicated by the vectors A, B, and C in the figure. The magnitudes of these three vectors are: A = 12.0 m, B = 17.0 m, and C = 7.0 m. Let the +x-axis point to the right and the +y-axis point to the far side of the ...
*September 11, 2011 by !!!!*

**physics**

Consider a rock that is thrown off a bridge of height 27 m at an angle θ = 24° with respect to the horizontal as shown in the figure above. If the initial speed the rock is thrown is 12 m/s, find the following quantities: (a) The time it takes the rock to reach its ...
*September 6, 2010 by frank*

**physics**

A hot-air balloon of mass 200 kg is descending vertically with downward acceleration of magnitude 1.2 m/s2. How much mass (ballast) must be thrown out to give the balloon an upward acceleration of magnitude 1.2 m/s2 (same magnitude but opposite direction)? Assume that the ...
*March 2, 2011 by karim*

**physics**

A hot-air balloon of mass 200 kg is descending vertically with downward acceleration of magnitude 1.2 m/s2. How much mass (ballast) must be thrown out to give the balloon an upward acceleration of magnitude 1.2 m/s2 (same magnitude but opposite direction)? Assume that the ...
*March 2, 2011 by karim*

**physics**

A space vehicle is coasting at a constant velocity of 24.7 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.228 m/s2 in the +x direction. After 42.3 s, the pilot ...
*February 10, 2011 by frost*

**physics**

A space vehicle is coasting at a constant velocity of 22.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.223 m/s2 in the +x direction. After 57.5 s, the pilot ...
*January 31, 2012 by Alex*

**physics**

A space vehicle is coasting at a constant velocity of 24.9 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.338 m/s2 in the +x direction. After 53.7 s, the pilot ...
*June 23, 2013 by louis aaaa*

**physics**

Which of the following statements is a true statement? A. A vector can have positive or negative magnitudes. B. A vector's magnitude cannot be more than the magnitude of one of its components. C. If the x-component of a vector is smaller than its y-component then that vector ...
*December 6, 2013 by laura*

**Physics**

A two-stage rocket moves in space at a constant velocity of 5100 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1250-kg upper stage is 5520 m/s in the same direction as before the ...
*October 26, 2010 by Velocityof two stage rocket*

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