Tuesday

September 23, 2014

September 23, 2014

Number of results: 79,894

**physics**

In the figure, forces A, B, C and D each have magnitude 50.0 N and act at the same point on the object. What torque (magnitude and direction) does A force exert on the object about point P? What torque (magnitude and direction) B does force exert on the object about point P? ...
*April 12, 2008 by Erin*

**INTRO TO PHYSICS**

a) A simple pendulum consists of a small object of mass 3.3 kg hanging at the end of a 2.0-m-long light string that is connected to a pivot point.Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes a 4.5° angle with ...
*October 31, 2012 by Sandy*

**physics- torque**

1. Find the magnitude of the torque produced by a 3.0 N force applied to a door at a perpendicular distance of 0.25 m from the hinge. 2. A simple pendulum consists of a 3.0 kg point mass hanging at the end of a 2.0 m long light string that is connected to a pivot point. a. ...
*January 13, 2007 by Anonymous*

**Physics**

A body is pivoted at a Point O. Three forces act on it in the directions shown on the figure. FA = 11 N at point A, 8.0 m from O. FB = 15 N at point B, 4.0 m from O. FC = 20 N at point C, 3.0 m from O. What is the net torque about point O? You have to also have the direction ...
*March 18, 2007 by wolfpak*

**physics**

A force in the +y direction applied at the point x=2.3m,y=1.4m gives rise to a torque of 39n*m about the origin. Find the magnitude of the force.
*November 16, 2012 by jenn*

**Physics**

Two forces act concurrently on a point P. One force is 60nt due east. The second force is 80nt due north. (a) Find the magnitude and direction of their resultant. (b) What is the magnitude and direction of the equilibriant?
*January 17, 2011 by Elise*

**Physics, check my answer pls**

4. All of the following are true about torque except: A. its units are Newton-meters. B. it can only be produced by a force. C. torque is zero unless the force is pointed perpendicular to the moment arm. D. a force whose line of action passes through the axis of rotation ...
*December 6, 2012 by Nev*

**physics**

Consider a 9·kg disk with a radius of 0.9·m and rotating about an axis passing through its center. (a) What is its rotational inertia? ______ kg·m2 ? (b) Suppose the disk is rotating counterclockwise and speeding up with a rotational acceleration of 4·rad/s2. What is the net ...
*February 6, 2013 by wally*

**Physics HELP!**

A simple pendulum consists of a small object of mass 7.40 kg hanging at the end of a 2.10 m long light string that is connected to a pivot point. (a) Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes a 3.00° angle ...
*November 7, 2012 by Brad*

**physics**

A simple pendulum consists of a small object of mass 3.20 kg hanging at the end of a 3.70 m long light string that is connected to a pivot point. (a) Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes a 7.00° angle ...
*November 11, 2012 by Anonymous*

**physics**

A simple pendulum consists of a small object of mass 1.2 kg hanging at the end of a 2.07 m long light string that is connected to a pivot point. Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes an angle of 6.59 ...
*March 26, 2014 by Anonymous*

**physics**

A pendulum consists of an object of mass 1.07 kg that hangs at the end of a massless bar, a distance 1.14 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 22° with the vertical. torque = ...
*October 11, 2008 by Vishnu*

**physics**

A pendulum consists of an object of mass 1.07 kg that hangs at the end of a massless bar, a distance 1.14 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 22° with the vertical. torque = ...
*October 13, 2008 by Samuel*

**PHYSICS**

A simple pendulum consits of a 3.0 kg point mass hanging at the end of a 2.0 long light string that is connected to a pivot point. a. Calculate the magnitude of the torque (due to the force of gravity) around this pivot point when the string makes a 5 degree angle with the ...
*January 16, 2007 by Anonymous*

**Physics**

Consider a torque ⃗τ that is constant in both magnitude and direction, and acts on a rigid body of mass 10 kg at a point 1 m from the pivot. How much work does the torque do on the rigid body, if it turns through an angle of 180◦ while the torque is acting? ...
*July 2, 2014 by Kaylee*

**Physics**

A force, F = (3x + 4y) N, is applied to an object at a point whose position vector with respect to the pivot point is r = (3x + 3y + 3z) m. Calculate the torque created by the force about that pivot point. I know that torque = -12x + 9y + 3z, but why is -12x negative? Thank ...
*June 18, 2012 by James*

**Physics**

q1= 25 pC q2 = -75 pC A) calculate the magnitude of the electric force between the two charges B) Is the force attractive or repulsive? C) calculate the magnitude and direction of E1 *( there is an arrow above E1) , the electric field at the orgin due to charge q1. D) ...
*April 12, 2011 by Angela Britt*

**physics**

A forse of 75 N due north and 105 N due east is acting on a point. What is the magnitude and direction of the resultant force? What is the magnitde and direction of the equilibrant?
*November 2, 2011 by Sarah*

**Physics - Torque**

A particle is acted on by two torques about the origin: T1 has a magnitude of 4.3 N*m and is directed in the positive direction of the x axis, and T2 has a magnitude of 3.2 N*m and is directed in the negative direction of the y axis. What are the magnitude [in N*m] and ...
*March 31, 2007 by COFFEE*

**Physics**

A simple pendulum consists of a 3 kg point of mass hanging at the end of a 2 m long light string that is connected to a pivot point. a. Calculate the magnitude of the torque (due to gravitational force) around this pivot point when the string makes a 5 degree angle with the ...
*December 7, 2008 by Kathrine*

**physics**

A pendulum consists of an object of mass 1.07 kg that hangs at the end of a massless bar, a distance 1.14 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 22° with the vertical.
*October 9, 2008 by Ellen*

**Mcmaster**

A pendulum consists of an object of mass 2.26 kg that hangs at the end of a massless bar, a distance 2.02 m from the pivot point. Calculate the magnitude of the torque due to gravity about the pivot point if the bar makes an angle of 54° with the vertical.
*March 7, 2012 by Gabbie*

**physics**

Two ropes are attached to a skater as sketched in the figure below and exert forces on her as shown. Find the magnitude and direction of the total force exerted by the ropes on the skater if θ1 = 32.0° and θ2 = 53.0°. what is the magnitude and direction (horizontal) ?
*February 21, 2009 by kj*

**Physics**

A duck has a mass of 2.3 kg. As the duck paddles, a force of 0.08 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.21 N in a direction of 55° south of east. When these forces begin to act, the velocity of the duck is 0.10 m/s in a...
*October 12, 2010 by Niveen*

**physics**

A proton, traveling with a velocity of 4.9 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 7.4 10-14 N and a direction of due south. What are the magnitude and direction of the magnetic field causing the force?
*February 26, 2014 by Dee*

**physics**

Before starting this problem, review Conceptual Example 7. The force vector A has a magnitude of 79.0 newtons (N) and points due east. The force vector B has a magnitude of 107 N and points 75.0 ° north of east. Find the (a) magnitude and (b) direction of A - B. (Give the ...
*January 30, 2011 by thaokieu*

**physics**

Before starting this problem, review Conceptual Example 7. The force vector A has a magnitude of 70.0 newtons (N) and points due east. The force vector B has a magnitude of 111 N and points 71.4 ° north of east. Find the (a) magnitude and (b) direction of A - B. (Give the ...
*January 30, 2012 by jim*

**science physics**

1.) What is the Magnitude of the electrostatic force on a +5 C charge 1.75 m to the left of a -2.5 C charge? (show your work) 2.) In What direction does the force on the +5 C charge act? 3.)Calculate the magnitude of the electric field of the -2.5 C charge at the location of ...
*May 14, 2013 by Todd*

**Physics**

Given the vector from the pivot point to the force and the magnitude of the force. 1.How would one find the angle of the force? 2.How would one find the torque? 3.How would one calculate the maximum/minimum torque?
*October 8, 2011 by Anonymous*

**physics**

A 301-kg boat is sailing 16.5° north of east at a speed of 2.08 m/s. Thirty seconds later, it is sailing 37.2° north of east at a speed of 3.60 m/s. During this time, three forces act on the boat: a 32.7-N force directed 16.5° north of east (due to an auxiliary engine), a 21.7...
*October 3, 2012 by Anonymous*

**Physics**

A 301-kg boat is sailing 16.5° north of east at a speed of 2.08 m/s. Thirty seconds later, it is sailing 37.2° north of east at a speed of 3.60 m/s. During this time, three forces act on the boat: a 32.7-N force directed 16.5° north of east (due to an auxiliary engine), a 21.7...
*October 9, 2012 by Anonymous*

**Calc 3**

A wrench .9m long lies along the positive y-axis, and grips a bolt at the origin. A force is applied in the direction of (0,1,3) at the end of the wrench. Find the magnitude of the force in newtons needed to supply 100 J of torque to the bolt. This is the formula i have: T=|r ...
*September 13, 2007 by Raquel*

**Physics**

The drawing shows two identical systems of objects; each consists of the same three small balls connected by massless rods. In both systems the axis is perpendicular to the page, but it is located at a different place, as shown. The same force of magnitude F is applied to the ...
*April 1, 2012 by Beth*

**physics**

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.19 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at A and B ...
*January 17, 2012 by Taylor*

**physics**

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.19 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at A and B ...
*January 17, 2012 by Taylor*

**Trig..please help!**

Two forces are pushing an ice shanty along the Ice. One has a magnitude of 330 lb in a direction due east. The other force has a magnitude of 110 lb in a direction 54 degrees east of north. What are the magnitude and direction of the resulant force?
*January 6, 2013 by Rachel*

**Physics**

Consider a torque ⃗τ that is constant in both magnitude and direction, and acts on a rigid body of mass 10 kg at a point 1 m from the pivot. How much work does the torque do on the rigid body, if it turns through an angle of 180◦ while the torque is acting? ...
*July 2, 2014 by Kaylee*

**physics**

A force, F = (2x + 5y) N, is applied to an object at a point whose position vector with respect to the pivot point is r = (2x + 4y + 5z) m. Calculate the torque created by the force about that pivot point.
*March 25, 2011 by HELP!!!!*

**College Physics**

A force, F = (2x + 3y) N, is applied to an object at a point whose position vector with respect to the pivot point is r = (5x + 4y + 2z) m. Calculate the torque (in units on Nm) created by the force about that pivot point.
*November 3, 2013 by Kimmy*

**physics**

Two forces are applied to a tree stump to pull it out of the ground. Force A has a magnitude of 2880 newtons (N) and points 42.0 ° south of east, while force B has a magnitude of 4360 N and points due south. Using the component method, find the (a) magnitude and (b) direction ...
*September 5, 2014 by Shant*

**Physics**

A ball (mass = 250 g) on the end of an ideal string is moving in circular motion as a conical pendulum. The length L of the string is 1.92 m and the angle with the vertical is 37 degrees. A) What is the magnitude of the torque (N m) and direction (from the listed answers) of ...
*November 13, 2010 by Miki*

**physics**

A duck has a mass of 2.9 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 0.21 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...
*October 13, 2010 by Sean*

**Physics**

1. Consider the two vectors P and Q. The definition of P is P = i × (i × j). The definition of Q is Q = (i × i) × j . a. The magnitude of P is equal to the magnitude of Q. b. The magnitude of P is greater than the ...
*December 27, 2011 by Sarah*

**PHY 131**

three forces act on a moving force object. one cforce has a magnitude of 80.O N and is directed due north. another has a magnitude of 60.0N and is due west. What must the magnitude and direction of the 3rd force, such that the object continues to move at a constant velocity.
*March 23, 2010 by S.Strange*

**Physics**

A 10.0-kg object experiences a drag force due to air resistance. The magnitude of this drag force depends on its speed, and obeys the equation Fdrag =(12.0 N-s/m)v + (4.00 N-s2/m2)v2. (a) What is the terminal speed of this object if it is falling due to gravity? (b) At what ...
*February 19, 2013 by Stehlin*

**Physics - Torque**

A particle is acted on by two torques about the origin: T1 has a magnitude of 4.3 N*m and is directed in the positive direction of the x axis, and T2 has a magnitude of 3.2 N*m and is directed in the negative direction of the y axis. What are the magnitude [in N*m] and ...
*March 31, 2007 by COFFEE*

**physics**

When we studied the concept of work, we learned that work = force x distance. Now we learn that torque = force x distance. What's different about these two definitions?A) For work, distance and force are in the same direction; for torque they are perpendicular to each other.B...
*March 1, 2012 by jim*

**principles of physics**

When we studied the concept of work, we learned that work = force x distance. Now we learn that torque = force x distance. What's different about these two definitions?A) For work, distance and force are in the same direction; for torque they are perpendicular to each other.B...
*March 2, 2012 by CHRIS*

**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 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 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**

3 FORCES ACT ON MOVING OBJECT.FIRST FORCE HAS MAGNITUDE OF 80.0N AND DIRECTED DUE NORTH.ANOTHER HAS MAGNITUDE 60.0N AND DIRECTED DUE WEST.WHAT IS THE MAGNITUDE AND DIRECTION OF THIRD FORCE,SUCH THAT THE OBJECT MOVE IN CONSTANT VELOCITY?
*June 25, 2012 by Anonymous*

**physics**

A duck has a mass of 2.70 kg. As the duck paddles, a force of 0.130 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.210 N in a direction of 52.0 ° south of east. When these forces begin to act, the velocity of the duck is 0.110 m...
*November 25, 2012 by John*

**physics**

A duck has a mass of 2.10 kg. As the duck paddles, a force of 0.110 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.240 N in a direction of 47.0° south of east. When these forces begin to act, the velocity of the duck is 0.120 m/...
*February 21, 2013 by bebenel*

**Physics please clarify**

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.135 m). The charges on the circle are -3.20 µC at the position due north and +5.00 µC at the position due east. What is the magnitude and ...
*August 31, 2007 by Mary*

**Mechanics & hydromechanics**

Three forces pulling on a body are in equilibrium.The direction of one is due south, the direction of another is 80 degrees east of north, and the third force acts in the direction of 35 degrees west of north.If the magnitude of the southerly force is 38 N, Find the magnitude ...
*January 14, 2013 by joe*

**Physics(Please help)**

A force, F1 of magnitude 2.0N and directed due east is exerted on an object is F2=2.0N due north. What is the magnitude and direction of a third force, F3, which must be exerted on the object so that the resultant force is zero? I am not sure how to start this problem!! Thank ...
*May 21, 2012 by Hannah*

**Physics**

A 343-kg boat is sailing 16.2° north of east at a speed of 1.98 m/s. Thirty seconds later, it is sailing 37.5° north of east at a speed of 3.76 m/s. During this time, three forces act on the boat: a 30.3-N force directed 16.2° north of east (due to an auxiliary engine), a 22.3...
*February 9, 2012 by Natasha*

**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 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*

**physics**

Two point charges, q1 and q2, are placed 0.30 m apart on the x-axis, as shown in the figure above. Charge q1 has a value of –3.0 x 10–9 C. The net electric field at point P is zero Q: Calculate the magnitude of charge q2. Q: Calculate the magnitude of the electric force on q2 ...
*February 23, 2012 by Kayberlynn*

**help me please**

Four 9.5 kg spheres are located at the corners of a square of side 0.70 m. Calculate the magnitude and direction of the gravitational force on one sphere due to the other three. What is the magnitude? ___ N Figure the vector of the opposite corner, and the adjacent corners ...
*October 9, 2006 by Teri D*

**Physics**

A force is applied to a door at an angle of 56.8° and 0.34 m from the hinge. a) What force produces a torque with a magnitude of 2.18 N·m? b) How large is the maximum torque this force can exert?
*March 12, 2013 by Mike*

**Physics**

A 50-story building is being planned. It is to be 200.0 high with a base 48.0 by 66.0 . Its total mass will be about 2.5×107 , and its weight therefore about 2.5×108 . Suppose a 200 wind exerts a force of 860 over the 66.0 wide face . Part A Calculate the magnitude of the ...
*June 29, 2011 by Jenny*

**Physics**

A jogger travels a route that has two parts. The first is a displacement of 2.90 km due south, and the second involves a displacement that points due east. The resultant displacement + has a magnitude of 4.25 km. (a) What is the magnitude of , and what is the direction of + as...
*August 25, 2013 by RW*

**physics**

A jogger travels a route that has two parts. The first is a displacement of 2.15 km due south, and the second involves a displacement that points due east. The resultant displacement + has a magnitude of 3.95 km. (a) What is the magnitude of , and what is the direction of + as...
*January 27, 2014 by timmmothy*

**Physics**

A jogger travels a route that has two parts. The first is a displacement of 2.20 km due south, and the second involves a displacement that points due east. The resultant displacement + has a magnitude of 4.10 km. (a) What is the magnitude of , and what is the direction of + as...
*January 28, 2014 by Alister*

**Physics please check**

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.125 m). The charges on the circle are -4.60 µC at the position due north and +5.00 µC at the position due east. What is the magnitude and ...
*December 14, 2007 by Mary*

**physics **

A person exerts a horizontal force of 36 N on the end of a door 97cm wide. What is the magnitude of the torque if the force is exerted perpendicular to the door and What is the magnitude of the torque if the force is exerted at a 70.0 angle to the face of the door? Thank you
*May 14, 2012 by emmie*

**Physics**

the dimensions of torque are the same as those of energy. Why it would nevertheless be inappropriate to measure torque in joules. Energy is force x distance, where distance is the distance in the direction of force. Torque is force x distance perpenduclar to force. Joules is a...
*February 26, 2007 by Ishani*

**Physics-Torques**

Suppose you have a meter stick with two masses attached. The mass m1 is 0.60 kg and it is located at x1 = 30 cm from the left (zero) end of the meter stick. The pivot point is located at x = 45 cm. The mass of the meter stick (mms = 0.40 kg) is located at its geometric center...
*March 20, 2007 by Nicole*

**Physics 1**

A bird watcher meanders through the woods, walking 0.45 km due east, 0.80 km due south, and 2.05 km in a direction 43.0° north of west. The time required for this trip is 2.50 h. (a) Determine the magnitude and direction (relative to due west) of the bird watcher's ...
*September 18, 2012 by Anonymous*

**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*

**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**

A 316-kg boat is sailing 12.0° north of east at a speed of 1.60 m/s. 39.0 s later, it is sailing 36.0° north of east at a speed of 4.00 m/s. During this time, three forces act on the boat: a 31.4-N force directed 12.0° north of east (due to an auxiliary engine), a 20.7-N force...
*September 14, 2012 by marissa*

**Physics**

A 325-kg boat is sailing 15.0° north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0° north of east at a speed of 4.00 m/s. During this time, three forces act on the boat: a 31.0-N force directed 15.0° north of east (due to an auxiliary engine), a 23.0...
*November 13, 2009 by Litany*

**Physics**

A 325-kg boat is sailing 15.0° north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0° north of east at a speed of 4.00 m/s. During this time, three forces act on the boat: a 31.0-N force directed 15.0° north of east (due to an auxiliary engine), a 23.0...
*November 13, 2009 by Litany*

**Physics**

A 358-kg boat is sailing 15.9° north of east at a speed of 1.80 m/s. Thirty seconds later, it is sailing 36.6° north of east at a speed of 3.68 m/s. During this time, three forces act on the boat: a 29.7-N force directed 15.9° north of east (due to an auxiliary engine), a 23.9...
*September 22, 2011 by Jasmin*

**physics**

A 358-kg boat is sailing 15.9° north of east at a speed of 1.80 m/s. Thirty seconds later, it is sailing 36.6° north of east at a speed of 3.68 m/s. During this time, three forces act on the boat: a 29.7-N force directed 15.9° north of east (due to an auxiliary engine), a 23.9...
*September 23, 2011 by Jasmin*

**Physics**

A 343-kg boat is sailing 16.2° north of east at a speed of 1.98 m/s. Thirty seconds later, it is sailing 37.5° north of east at a speed of 3.76 m/s. During this time, three forces act on the boat: a 30.3-N force directed 16.2° north of east (due to an auxiliary engine), a 22.3...
*February 12, 2012 by Natasha*

**Physics**

A 325 kg boat is sailing 15.0 degrees north of east at a speed of 2.00 m/s. Thirty seconds later, it is sailing 35.0 degrees north of east at a speed of 4.00 m/s. During this time three forces act on the boat: a 31.0 N force directed 15.0 degrees north of east (due to an ...
*October 14, 2010 by Melanie*

**Physics**

A 4.00-m-long, 500 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 70.0 kg construction worker stands at the far end of the beam. What is the magnitude of the torque about the point where the ...
*December 4, 2010 by Anonymous*

**Physics**

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.135 m). The charges on the circle are -3.20 µC at the position due north and +5.00 µC at the position due east. What is the magnitude and ...
*August 29, 2007 by Mary*

**Physics**

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.135 m). The charges on the circle are -3.20 µC at the position due north and +5.00 µC at the position due east. What is the magnitude and ...
*September 1, 2007 by Mary*

**Physics please check**

A uniform solid disk with a mass of 32.3 kg and a radius of 0.414 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk. (a) What is the net torque produced by the two forces? (Assume counterclockwise is the positive direction.) (b) ...
*April 24, 2007 by Mary*

**Physics**

A boat has a mass of 6800 kg. Its engines generate a drive force of 4500 N, due west, while the wind exerts a force of 660 N, due east, and the water exerts a resistive force of 1200 N due east. What is the magnitude and direction of the boat's acceleration?
*September 23, 2012 by Lacie*

**Physics**

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.18 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at A and B ...
*January 12, 2011 by ali*

**physics torque and shelf**

When a wood shelf of mass 6.1 kg is fastened inside a slot in a vertical support, the support exerts a torque on the shelf. The board is 32cm wide by 3cm tall. the slot is 2 cm wide (3cm tall)on the lefthand side. So there are three vertical forces. A) Calculate the upward ...
*May 22, 2009 by kelsi*

**Physics**

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.130 m). The charges on the circle are -4.00 µC at the position due north and +5.00 µC at the position due east. What is the magnitude and ...
*September 21, 2007 by Mary*

**Physics**

Forces F1=7.50N and F2=5.30N are applied tangentially to a wheel with radius 0.330 m. What is the net torque on the wheel due to these two forces for an axis perpendicular to the wheel and passing through its center? It depends upon whether or not the forces F1 and F2 are both...
*March 27, 2007 by Karla*

**physics**

A 42 mT magnetic field points due west. If a proton of kinetic energy 9x10E-12 J enters this field in an upward direction, find the magnetic force acting on the proton in magnitude and direction. What magnetic force would an electron experience due to Earth’s magnetic field if...
*July 27, 2014 by seanmarch58*

**physics**

Two 10 meter long wires are parallel to each other and 5 cm apart.They carry currents of 6.0 A in opposite directions. What is the magnitude and direction of the magnetic field at a point P,halfway between the wires? Calculate the force exerted by the left wire on the right ...
*May 24, 2009 by Sandhya*

**physics**

At one instant a bicyclist is 58.0 m due east of a park's flagpole, going due south with a speed of 13.0 m/s. Then 35.0 s later, the cyclist is 58.0 m due north of the flagpole, going due east with a speed of 13.0 m/s. For the cyclist in this 35.0 s interval, what are the (a) ...
*September 17, 2013 by kristy*

**Physics**

As a swimmer pulls his arm through the water, various muscles exert forces on the upper arm. The figure below shows a force F exerted on the humerus (upper arm bone) by the pectoral muscle. The muscle is connected to the bone d = 7.00 cm from the center point O of the shoulder...
*November 8, 2012 by Pat*

**physics help**

A pendulum of mass m= 0.8 kg and length l=1 m is hanging from the ceiling. The massless string of the pendulum is attached at point P. The bob of the pendulum is a uniform shell (very thin hollow sphere) of radius r=0.4 m, and the length l of the pendulum is measured from the ...
*January 10, 2014 by Anonymous*

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