Sunday

May 1, 2016
Number of results: 67,153

**physics**

At an accident scene on a level road, investigators measure a car's skid mark to be 78 m long.It was a rainy day and the coefficient of friction was estimated to be 0.38. Use these data to determine the speed of the car when the driver slammed on (and locked) the brakes.
*November 20, 2009 by sherry*

**physics**

At an accident scene on a level road, investigators measure a car's skid mark to be 58 m long. It was a rainy day and the coefficient of friction was estimated to be 0.46. Use these data to determine the speed of the car when the driver slammed on (and locked) the brakes.
*October 18, 2010 by xz*

**physics!!!!!! (The questions are actually short)**

CAn an object be increasing its speed with negative acceleration-----explain why or why not give an example of when both velocity and acceleration are neg. can the magnitude of a vector ever equal or be less than one of its components? If you are riding a train that speeds ...
*October 24, 2010 by Kavi *

**dynamics**

a motorcycle traffic police starts from rest at point A two seconds after a car speeding at the constant rate of 120 km/h passes point A (where speed limit is 100 km/h only) if the policeman accelerates at the rate of 6 m/s^2 until he reaches the speed of 150 km/h and ...
*April 1, 2013 by mahdi*

**physics**

Posted by sandhu on Wednesday, November 24, 2010 at 4:29am. The firetruck goes around a 180°, 162 m radius circular curve. It enters the curve with a speed of 12.6 m/s and leaves the curve with a speed of 38.8 m/s. Assuming the speed changes at a constant rate, what is the ...
*November 24, 2010 by sandhu*

**Physics**

In a car crash, Car A rear ends Car B that stopped at a red light. After the crash, Car A and Car B meld together moving at a speed of 14 m/s. Car A has a mass of 1750 kg. Car B has a mass of 2000 kg. Calculate the initial momentum of Car A. So far I have Va=? Ma= 1750 kg Vb=0...
*November 30, 2015 by Rebecca*

**physics**

An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 9.80 m/s in 3.10 s. (a) What is the magnitude and direction of the bird’s acceleration? (b) Assuming that the acceleration remains the same, what is the bird’s ...
*June 16, 2013 by louis aaaaa*

**Physics**

An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 10.9 m/s in 3.70 s. (a) What is the magnitude and direction of the bird’s acceleration? (b) Assuming that the acceleration remains the same, what is the bird’s ...
*September 2, 2013 by Brianna*

**Physics**

An upward force of 35 N is applied via a string to lift a ball with a mass of 2.1 kg. (a) What is the net force acting upon the ball? magnitude 1 N direction 2 ---Select--- upward downward (b) What is the acceleration of the ball? magnitude 3 m/s2 direction 4 ---Select--- ...
*February 20, 2012 by Mina*

**Physics**

A flat go-kart track consists of two straightways 100 m long with semicircular ends which have a radius of 25.0 m. A go-kart executes the curved end with a constant tangential acceleration while SLOWING from 12.5 m/s to 5.0 m/s. Determine the magnitude of the total ...
*September 12, 2014 by Mia*

**Physics**

1. What constant acceleration, in SI units, must a car have to go from zero to 69.0 mph in 13.0s ? 2. What fraction of g is this? (the unit for this answer is % of g)
*August 28, 2008 by Jack*

**Physics**

A car accelerates at a constant rate from 13m/s to 25m/s in 6.0seconds. What was its acceleration? How far did it travel in this time?
*March 15, 2011 by Emily Grossman*

**Physics**

A car accelerates at a constant rate from 13m/s to 25m/s in 6.0seconds. What was its acceleration? How far did it travel in this time?
*March 16, 2011 by Emily Grossman*

**physics**

a car starts from rest and has a constant acceleration of 2.5 m/s^2. if it travels 25m how long will it take to complete the motion
*January 27, 2013 by Anonymous*

**calculus help**

What constant acceleration is required to increase the speed of a car from 22 mi/h to 50 mi/h in 3 s? (Round your answer to two decimal places.)
*April 19, 2014 by Kimberly :(*

**Physics**

An 11,000 N test car travels 44.5 m before stopping from an initial speed of 28.7 m/s on dry horizontal pavement with its wheels locked. (a) make a free body diagram of this car while its slowing down. (b) what external force causes it to slow down. (c) Assuming constant ...
*October 6, 2009 by SaraH*

**physics**

A speeder passes a police car while traveling 130km/h. the police car imediently starts to accelerate at 10m/s^2 until the police car catches up to the speeder. how long does it take the police car to catch up?
*February 23, 2011 by Ty*

**Physics**

For a standard production car, the record for road test acceleration goes to the 1993 Ford RS200 Evolution. This car went from 0 to 2.911x10^1 m/s in 3.279x10^0 seconds. What is the average acceleration, expressed to 3 significant figures?
*October 13, 2010 by dylan*

**Physics**

A 245 g toy car is placed on a narrow 70-cm-diameter track with wheel grooves that keep the car going in a circle. The 1.0 kg track is free to turn on a frictionless, vertical axis. The spokes have negligible mass. After the car's switch is turned on, it soon reaches a steady ...
*April 19, 2014 by Kaitlyn*

**physics**

a car moving with constant acceleration covers a distance between two points 180m apart in 6 sec.its speed as it passes the second point in 45m/s. what is its acceleration and its speed at the first point? options: 1. -5 m/s^2;15m/s 2. 5 m/s^2;15m/s
*May 26, 2012 by srikala*

**physic**

A 7.28-kilogram bowling ball traveling 8.50 meters per second east collides head-on with a 5.45 kilogram bowling ball traveling 10.0 meters per second west. Determine the magnitude of the total momentum of the two-ball system after the collision
*December 10, 2014 by natsu*

**Physics**

At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 2.50 . At the same instant, a truck, traveling with a constant speed of 15.4 , overtakes and passes the automobile. How far beyond ...
*September 10, 2006 by JC*

**physics**

A military gun is mounted on a railroad car (m = 1590 kg) as shown in Figure P7.34. There is no frictional force on the car, the track is horizontal, and the car is initially at rest. The gun then fires a shell of mass 26 kg with a velocity of 280 m/s at an angle of 28° with ...
*October 2, 2011 by megan*

**physics**

A 1260.4 kg car is traveling at 21.5 m/s when the driver takes his foot off the gas pedal. It takes 4 s for the car to slow down to 20 m/s. How large is the net force slowing the car? Answer in units of N.
*October 13, 2010 by kayla*

**physics**

A 1502.7 kg car is traveling at 33.1 m/s when the driver takes his foot oﬀ the gas pedal. It takes 4.7 s for the car to slow down to 20 m/s. How large is the net force slowing the car? Answer in units of N
*October 26, 2012 by Anonymous*

**physics**

A 1543.1 kg car is traveling at 25.1 m/s when the driver takes his foot off the gas pedal. It takes 5.7 s for the car to slow down to 20 m/s. How large is the net force slowing the car? Answer in units of N
*December 9, 2014 by kenny*

**physics**

An ore car of mass 42000 kg starts from rest and rolls downhill on tracks from a mine. At the end of the tracks, 6.8 m lower vertically, is a horizontally situated spring with constant 3.8 x 10^5 N/m. The acceleration of gravity is 9.8 m/s^2. How much is the spring compressed ...
*December 8, 2011 by Stacy*

**physics**

A Boeing 787 is initially moving down the runway at 3.0 m/s preparing for takeoff. The pilot pulls on the throttle so that the engines give the plane a constant acceleration of 1.7 m/s2. The plane then travels a distance of 1900 m down the runway before lifting off. How long ...
*September 8, 2013 by Karen*

**Physics**

A car is traveling at 54.2 km/h on a flat highway. The acceleration of gravity is 9.81 m/s^2. PART 1: If the coefficient of kinetic friction between the road and the tires on a rainy day is 0.131, what is the minimum distance needed for the car to stop? Answer in unitsof m. ...
*October 3, 2010 by Elizabeth*

**Physics help pls**

Pls help me I have a test tmrw A block with mass 5kg slides along a horizontal floor under the action of a force 20N applied upward at an angle θ to the horizontal. The coefficient of kinetic friction between the block and the floor is μk = 0.4. Find the angle θ...
*March 21, 2016 by Jamila*

**Physics**

An object with a mass of 2.489x10^1 kg is subjected to a force of 4.8124x10^2 N directed at an angle of 2.819x10^1 degrees from the x axis. A second force of 2.84529x10^3 N acting in the negative X directions is also applied to the object. To two significant figures what is ...
*October 22, 2010 by PHYSICS HELP PLS*

**Physics**

Two point charges q1 and q2 are held 4.00cm apart. An electron released at a point that is equidistant from both charges undergoes an initial acceleration of 9.00×10^18m/s^2 directly upward in the figure, parallel to the line connecting q1 and q2. See the figure: session#...
*January 17, 2015 by Luciano*

**Physics**

A 24-ton freight car rolls along a straight track with a speed of 10mph. A 2.0 ton automobile falling vertically lands on the freight car from above. a) what is the speed of the freight car after the car lands on it? b) the car then rolls sideways off the freight car. What is ...
*April 26, 2012 by Sarah*

**Physics**

A car starts from rest with an acceleration of 1.87 m/s^2 at the same time that a second car moving with a velocity of 29.2 m/s passes it. How far does the first car move before it overtakes the second car?
*November 9, 2015 by Frank William*

**Physics**

The Lamborghini Murcielago can accelerate from 0 to 27.8 m/s (100 km/hr or 62.2 mi/hr) in a time of 3.40 seconds. How fast will the car be traveling (m/s) after 5.1 seconds.
*February 22, 2014 by Erin*

**Physics**

The Lamborghini Murcielago can accelerate from 0 to 27.8 m/s (100 km/hr or 62.2 mi/hr) in a time of 3.40 seconds. How fast will the car be traveling (m/s) after 5.1 seconds.
*February 22, 2014 by Sammy*

**NSCI 110**

a car that was initially moving at 25 m/s is accerlerated at 4.0 m/s^2 for 5.0 s. the final speed of the car is?
*October 7, 2012 by ebony*

**physics**

Light-rail passenger trains that provide transportation within and between cities are capable of modest accelerations. The magnitude of the maximum acceleration is typically 1.3 {\rm m}/{\rm s}^{2}, but the driver will usually maintain a constant acceleration that is less than...
*September 14, 2012 by kaitlyn*

**Physics**

Two blocks are in contact on a horizontal, frictionless table. Block 1 has a mass of 4.39 kg and block 2 has a mass of 2.59 kg. A horizontal force of magnitude 8.25 N is applied to the one of the blocks. Find the magnitude of the force between the blocks (a) if the given force...
*July 2, 2015 by Angela R*

**Physics**

In outer space, a constat net force of magnitude 140 N is exerted on a 32.5 kg probe initially at rest. (a) what acceleration does thie force produce? (b) how far does the probe travel in 10.0 s... I got a which equals 4.31 m.s^2 but how do i solve for b
*June 10, 2009 by Sarah*

**Kinematics**

A car has an acceleration of 2 m/s2. What is its speed 3 seconds after it starts moving?
*February 1, 2011 by Randy*

**physics**

A race car travels 90 m/s around a circular track of radius 93.5 m. 2.9 mg µ = 0.12 19◦ What is the magnitude of the resultant force on the 2900 kg driver and his car if the car does not slip?
*December 2, 2012 by ccbatman*

**Physics**

A space probe is traveling in outer space with a momentum that has a magnitude of 7.84 x 107 kg·m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 1.29 x 106 N and a direction opposite to the probe's motion. It fires ...
*April 10, 2014 by Elle*

**Physics**

A space probe is traveling in outer space with a momentum that has a magnitude of 7.84 x 107 kg·m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 1.29 x 106 N and a direction opposite to the probe's motion. It fires for...
*April 11, 2014 by Anonymous*

**math**

Two cars, A and B start from pretoria to polokwane respectively simultaneously and travel towards each other at constant speeds along the route.After meeting at a point between pretoria and polokwane,the two cars proceed to their respective destinations of polokwane and ...
*February 20, 2016 by Blodwick*

**Physics**

An alpha particle (charge +2e and mass 6.64 x10-27 kg) is traveling to the right at 1.50 km/s. What uniform electric field (magnitude and direction) is needed to cause it to travel to the left at the same speed after 2.65 s.?
*March 10, 2013 by Anonymous*

**Physics**

An alpha particle (charge +2e and mass 6.64 x10-27 kg) is traveling to the right at 1.50 km/s. What uniform electric field (magnitude and direction) is needed to cause it to travel to the left at the same speed after 2.65 s.?
*March 10, 2013 by Anonymous*

**physics**

In a lab experiment, a 1.5-kg cart traveling at 4.3 m/s in the +x direction collides with a 2.5-kg cart traveling at 2.7 m/s in the -x direction. After the collision, you find that the 2.5-kg cart is traveling at 1.9 m/s in the +x direction. How fast and in what direction is ...
*March 8, 2011 by nic*

**Physics-Intro**

A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?
*October 7, 2014 by Tommy*

**math/physics**

A 0.600-kg ball traveling 4.00 m/s to the right collides with a 1.00-kg ball traveling 5.00 m/s to the left. After the collision, the lighter ball is traveling 7.25 m/s to the left. What is the velocity of the heavier ball after the collision?
*October 7, 2014 by Jay*

**physics**

An ambulance is traveling east at 60.7 m/s. Behind it there is a car traveling along the same direction at 32.3 m/s. The ambulance driver hears his siren at a frequency of 521 Hz. At what frequency does the driver of the car hear the ambulance’s siren? The velocity of sound in...
*January 26, 2014 by Need answer by 10pm*

**Physics**

When a horizontal force of 350 is applied to a 86.0 box, the box slides on a level floor, opposed by a force of kinetic friction of 130 .What is the magnitude of the acceleration of the box?
*May 25, 2011 by EL*

**Physics**

A block of mass m1 = 2.4 kg initially moving to the right with a speed of 3.3 m/s on a frictionless, horizontal track collides with a spring attached to a second block of mass m2 = 4.1 kg initially moving to the left with a speed of 1.5 m/s as shown in figure (a). The spring ...
*October 14, 2013 by Leticia*

**Physics**

A block of mass m1 = 2.4 kg initially moving to the right with a speed of 3.3 m/s on a frictionless, horizontal track collides with a spring attached to a second block of mass m2 = 4.1 kg initially moving to the left with a speed of 1.5 m/s as shown in figure (a). The spring ...
*October 14, 2013 by Leticia*

**physics**

One end of a meter stick is pinned to a table, so the stick can rotate freely in a plane parallel to the tabletop. Two forces, both parallel to the tabletop, are applied to the stick in such a way that the net torque is zero. The first force has a magnitude of 2.00 N and is ...
*November 11, 2011 by meagan*

**physics**

One end of a meter stick is pinned to a table, so the stick can rotate freely in a plane parallel to the tabletop. Two forces, both parallel to the tabletop, are applied to the stick in such a way that the net torque is zero. The first force has a magnitude of 2.00 N and is ...
*July 16, 2013 by cj*

**phyics**

One end of a meter stick is pinned to a table, so the stick can rotate freely in a plane parallel to the tabletop. Two forces, both parallel to the tabletop, are applied to the stick in such a way that the net torque is zero. The first force has a magnitude of 2.00 N and is ...
*November 1, 2013 by bobby*

**PHYICS**

One end of a meter stick is pinned to a table, so the stick can rotate freely in a plane parallel to the tabletop. Two forces, both parallel to the tabletop, are applied to the stick in such a way that the net torque is zero. The first force has a magnitude of 2.00 N and is ...
*November 12, 2013 by LLYOD BLUE*

**physics**

Imagine you are sitting in a car tossing a ball straight up into the air. a) If the car is moving at constant velocity will the ball land in front of, behind, or in your hand? b) If the car rounds a curve at constant sped where will the ball land?
*March 1, 2012 by annoymus*

**Science**

A 110.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 35.0 deg with the horizontal. Find the magnitude of the applied force F.
*October 26, 2011 by Mark*

**physics**

2. A car of mass 1540 kg traveling at 28 m/s is at the foot of a hill that rises 125 m in 3.6 km. At the top of the hill, the speed of the car is 8 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses.
*October 5, 2010 by rizzo*

**physics**

A car of mass 1410 kg traveling at 26 m/s is at the foot of a hill that rises 115 m in 4 km. At the top of the hill, the speed of the car is 14 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses.
*October 4, 2012 by Rodrigo*

**Physics**

A car of mass 1490 kg traveling at 22 m/s is at the foot of a hill that rises 115 m in 3.2 km. At the top of the hill, the speed of the car is 12 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses.
*March 5, 2015 by Jennifer*

**Physics**

A car traveling at 40 m/s runs out of gas while traveling up a 7.0 ∘ slope How far will it coast before starting to roll back down?
*October 12, 2015 by raquel *

**physics**

in an emergency stop to avoid an accident, a shoulder-strap seat belt holds a 60kg passengr firmly in place. if the car was initially travelling at 90km/h and came to a stop in 4.5s along a straight, level road, what was the average force applied to the passenger by the seat ...
*March 9, 2009 by alexia*

**Physics **

A constant force of 100N , directed upward, is applied to a 5.0kg toy rocket by the rocket's engine. Find the rockets acceleration? I thought it'd be as simple as F=ma to be 20 m/s2 but I was wrong. What am I overlooking?
*February 15, 2014 by Eiban*

**PHYSICS**

Alex is doing tight circles with his car in an empty parking lot, all the while holding his speedometer reading to a steady 20 mph. Is Alex traveling at a constant velocity? Why or why not?
*December 22, 2010 by Katie*

**physics**

A 1180 kg car and 4720 kg truck undergo a perfectly inelastic collision. Before the collision, the car was traveling southward at 1.45 m/s , and the truck westward at 8.80 m/s. Find the velocity of the wreckage immediately after the collision. Enter the x and y components of ...
*February 16, 2016 by lizbeth*

**Physics**

Two cars are travelling in the same direction along a street. Car A collides with Car B and they lock together. Calculate tgeur velocity after the collision. Before: Car A: mass of 1001kg. Velocity of 12m/s Car B: mass of 1200kg Velocity of 10m/s After: V=?
*February 13, 2011 by Laureen*

**Applied physics**

a string is wrapped around a cylinder with radius of 20cm. If the force of 300N is applied to the string, what is the magnitude of the torque that is developed about the axis?
*March 31, 2012 by jose souljoe*

**Physics**

A space probe is traveling in outer space with a momentum that has a magnitude of 7.5e7 Kg*m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0e6N and a direction opposite to the probe's motion. It fires for a period ...
*March 11, 2012 by Natasha*

**physics**

A space probe is traveling in outer space with a momentum that has a magnitude of 7.5e7 Kg*m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0e6N and a direction opposite to the probe's motion. It fires for a period ...
*March 12, 2012 by Natasha*

**physics**

a 8.0 kg object undergoes an acceleration of 2.2 m/s squared.what is the resulting force acting on it?
*November 20, 2011 by marissa*

**physics**

Suppose a record turntable rotates at constant angular velocity. a) Does a point on the rim have radial and/or tangential acceleration? b) If the turntable's angular velocity increases uniformly, does the point have radial and/or tangential acceleration? c) For which cases ...
*April 11, 2010 by Vita*

**physics**

Suppose a record turntable rotates at constant angular velocity. a) Does a point on the rim have radial and/or tangential acceleration? b) If the turntable's angular velocity increases uniformly, does the point have radial and/or tangential acceleration? c) For which cases ...
*November 23, 2010 by henry*

**Physics**

What is the magnitude of the average force required to stop an 1500kig car in 8.0 s if the care is traveling at 95 km/h? Formula: Sigma F= ma *convert 95km/h to 26m/s Which kinematic equation do I use and for which variable do I use within the equation?
*June 11, 2012 by Mr. McKee*

**Calculus**

Batman was driving the Batmobile at 90 mph (=132 ft/sec), when he sees a brick wall directly ahead. When the Batmobile is 400 feet from the wall, he slams on the brakes, decelerating at a constant rate of 22ft/sec2. Does he stop before he hits the brick wall? If so, how many ...
*April 9, 2015 by Meme *

**PHYSICS? **

1300 kg car rounds a banked curve of radius= 50m. If car traveling at 75 km/h and the coefficient of static friction between the tire and road is 0.45 ... 1.) what is the minimum angle of the bank needed to keep the car in the turn? 2.) If the car changes tires, which ...
*March 21, 2016 by Dina*

**physics**

A man holds a 194-N ball in his hand, with the forearm horizontal (see the figure). He can support the ball in this position because of the flexor muscle force , which is applied perpendicular to the forearm. The forearm weighs 24.7 N and has a center of gravity as indicated. ...
*July 16, 2013 by macy*

**physics**

Traumatic brain injury such as concussionn results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s^2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1000 m/s^2 lasting for at least 1 ms ...
*September 18, 2008 by mb*

**physics**

Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1000 m/s2 lasting for at least 1 ms ...
*September 19, 2010 by greg*

**physics**

Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1000 m/s2 lasting for at least 1 ms ...
*September 22, 2011 by shahi*

**Physics**

Calculate the distance travelled by a car with a velocity of 30m/s and it increase its speed to 60 m/s in 2 hours.assume acceleration is constant.
*February 5, 2016 by Grace perez*

**Physics - Repost because of no response**

1. A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71oW] and the second stone moves away at a velocity of 1.25 m/s [N44oE], what was the initial velocity of the ...
*January 19, 2016 by Chanz*

**Physics... rotation**

A constant force of 40 N is applied tangentially to the rim of a wheel with 20 cm radius. The wheel has a moment of inertia of 30 kg m2. Show that the angular acceleration of the wheel is 0.27 rad s-2
*November 13, 2008 by Kimora*

**Physics**

A block of mass 2.30 kg is pushed 2.38 m along a frictionless horizontal table by a constant 16.0 N force directed 26.9o below the horizontal. Determine the work done by the applied force. Determine the magnitude of the normal force exerted by the table. Determine the ...
*October 1, 2013 by Chris*

**physics**

A block of mass 2.40 kg is pushed 2.09 m along a frictionless horizontal table by a constant 18.6 N force directed 23.7o below the horizontal. Determine the work done by the applied force. Determine the magnitude of the normal force exerted by the table. Determine the ...
*October 3, 2013 by beccs*

**physics **

The spring constant of the spring in the ﬁgure is 25 N/m, and the mass of the object is 4 kg. The spring is unstretched and the surface is frictionless. A constant 18 N force is applied horizontally to the object (stretching the spring). v0 = 0 Find the speed of the ...
*March 2, 2014 by Anonymous*

**Physics**

For parts A-C: /^Vo | 2M | velocity into pg. ->R )2m ) ------ top view rear view A car of mass, 2m, is going around a turn at a constant radius, R, with velocity, v0. The turn is not banked – it is a flat surface. Assume the car and the road are on Earth’s surface. a) Is ...
*April 6, 2013 by Greg*

**Physics**

A 700-kg car stopped at an intersection is rear-ended by a 1710-kg truck moving with a speed of 16.0m/s . 1) If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of the truck. 2)Find the final speed of the car.
*October 25, 2013 by Lhaedy*

**Physics - Am I correct? **

1. A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71oW] and the second stone moves away at a velocity of 1.25 m/s [N44oE], what was the initial velocity of the ...
*January 19, 2016 by Chanz*

**Physics**

A wheel starts from rest and rotates about its axis with constant angular acceleration. After 8.7 s have elapsed, it has rotated through an angle of 20 radians. I found that the angular velocity at 8.7 s is 4.60 rad/s. What is the angular acceleration of the wheel? What is the...
*November 21, 2014 by Ann*

**physics**

a block of mass 2 kg and block B of mass 8 kg are connected by a spring of spring constant 80 N/m and negligible mass. The system is being pulled to the right across a horizontal frictionless surface by a horizontal force 4 N with both blocks experiencing equal constant ...
*June 9, 2008 by shelly*

**Physics**

On vacation, your 1300 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 1.80 m/s2. What is the net force acting on the car? I have determined: 1) the force acting on the car by the trailer is 972 N. 2) The force acting on the trailer by the car is ...
*January 17, 2010 by Bobby C*

**Physics**

On vacation, your 1300 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 1.80 m/s2. What is the net force acting on the car? I have determined: 1) the force acting on the car by the trailer is 972 N. 2) The force acting on the trailer by the car is ...
*January 18, 2010 by Robert C*

**physics **

An ore car of mass 37000 kg starts from rest and rolls downhill on tracks from a mine. At the end of the tracks, 28 m lower vertically, is a horizontally situated spring with constant 2.8 × 10 5 N/m. The acceleration of gravity is 9.8 m/s 2 . Ignore friction. How much is the ...
*November 28, 2012 by mia*

**Physics **

Three identical blocks, fastened together by a string, are pulled across a frictionless surface by a constant force. Compare the tension on string A to magnitude of applied force F.
*August 5, 2010 by Shaila*

**physics**

A 90 kg box is pushed by a horizontal force F at constant speed up a ramp inclined at 28°, as shown. Determine the magnitude of the applied force. when the ramp is frictionless. when the coefficient of kinetic friction is 0.18.
*June 25, 2014 by Anonymous*

**Physics**

The parachute on a race car of weight 8,810 N opens at the end of a quarter-mile run when the car is traveling at 34 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1,100 m?
*February 7, 2013 by Ray*

**Physics**

For this problem, you are allowed to consult with other members of the class, but not with faculty and not with anyone outside the course. Simplify all your expressions. A car of mass, 2m, is going around a turn at a constant radius, R, with velocity, v0. The turn is not ...
*April 6, 2013 by David*