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A 2575-kg van runs into the back of a 825-kg compact car at rest. They move off together at 8.5 m/s. Assuming no friction with the ground, find the initial speed of the van.
After formula rearrangement, use the equation v1 = (m1+m2)v’ / m1. = +11m/s is the initial speed of the van
A hockey player makes a slap shot, exerting a force of 30.0 N on the hockey puck for 0.16 s. What impulse is given to the puck?
Use the equation Impulse = Force x change in time.
= 4.8 N x s
Two campers dock a canoe. One camper steps onto the dock. This camper has a mass of 80.0kg and moves forward at 4.0m/s. With what speed and direction do the canoe and the other camper move if their combined mass is 110kg?
After formula rearrangement, use the equation v2’ = -m1v1’ / m2
= -2.9m/s W
A 15g bullet is shot into a 5085g wooden block standing on a frictionless surface. The block, with the bullet in it, acquires a velocity of the bullet before striking the block. Calculate the velocity of the bullet before striking the block.
After formula rearrangement, use the equation v1 = (m1+m2)v’ / m1. = +5.1 × 10^6 m/s
