a student of mass m1= 64 kg runs towards his skateboard, which has a mass m2= 2.9kg and is d=2.85m ahead of him. he beings at rest and accelerates at a constant rate of a= 0.75m/s^2.  when he reaches the skateboard he jumps on it. what is the velocity of the student and skateboard in meterd per second?

A truck (M = 2500kg) collides with a car (m = 1000kg) at a 4-way intersection. Fortunately nobody gets hurt. Suppose the car is going north at 20m/s ( about 45mph) and the truck is coming from the east at 10m/s ( about 22mph). The car and truck stick together after the %3D collision. (a) Find the speed and direction of the car and truck immediately after the collision. (b) Approximately how much energy went into the deformation of the metal that caused the two vehicles to stick together? (c) What assumptions did you make? The

Momentum = mass (Kg) times velocity (m/s). Why does a train longer to stop than a car?

Calculate the distance traveled by the second cart during the 5.0 s interval after the collision.