Physics
posted by Mark .
A 0.1kg object is traveling to the right (in the positive direction) with a speed of 2 m/s. After a 0.2 s collision, the object is traveling to the left at 3 m/s. What is the magnitude of the impulse (in Ns) acting on the object? The answer must be positive.

Mass x (velocity change) = 0.1 x 5 kg m/s
= 0.5 N s
(1 kg m/s is the same as 1 N*s)
The duration of the collision doesn't matter in oomputing the impulse, but it does determine the force involved. 
a horizontal force of 100N is used to push a 20 kg box across a level floor for 10 m. how much work is done? how much work is needed to raise the same box by 10m?

20,000

20000
Respond to this Question
Similar Questions

Physics
A 0.24kg object traveling rightward at 3.5 m/s collides headon and elastically with a 0.40kg object traveling leftward at 2.1 m/s. (a) what are their velocities after collision? 
Physics
Object 1 (mass=5.5 kg) traveling in the +x direction at a speed of 12.40m/s undergoes an inelastic collision with Object 2 (mass=4.80kg) which is at rest. Object two flies off at a speed of 7.80m/s and an angle θ2=32.4 °. It … 
Physics
A cart traveling at 0.3 m/s collides with stationary object. After the collision, the cart rebounds in the opposite direction. The same cart again traveling at 0.3 m/s collides with a different stationary object. This time the cart … 
Physics (IMPULSE)
A cart traveling at 0.3 m/s collides with stationary object. After the collision, the cart rebounds in the opposite direction. The same cart again traveling at 0.3 m/s collides with a different stationary object. This time the cart … 
physics...PLZ HELP! =)
A constant force acts on a moving object. The object makes a fixed magnitude of displacement in some direction. In general, in what direction is the displacement that will result in the object traveling with the least kinetic energy … 
physics
A 3.0kg object moving 8.0 m/s in the positive x direction has a onedimensional elastic collision with an object (mass = M) initially at rest. After the collision the object of unknown mass has a velocity of 6.0 m/s in the positive … 
physics
A 3 kg object traveling 6m/s east has a perfectly elastic collilsion with a 4kg object traveling 8 m/s west After the sollision, the 3 kg object will travel 10 m/s west a. What was the total momentum before the collision? 
Physics
An Escort and a Camaro traveling at right angles collide and stick together. The Escort has a mass of 1200 kg and a speed of 25 km/h in the positive x direction before the collision. The Camaro has a mass of 1700 kg and was traveling … 
physics
A 450 kg car traveling north at 30 m/s collides with a 560 kg car traveling west at 35 m/s. If after the collision they become entangled and move off together, (a) what is magnitude of the final momentum of the cars? 
Physics URGENT
Object 1 (mass=6.4 kg) traveling in the +x direction at a speed of 14.01m/s undergoes an inelastic collision with Object 2 (mass=5.10kg) which is at rest. Object two flies off at a speed of 11.94m/s and an angle θ2=49.8 °. The …