A crate is attached to a winch or pulley that pulls the crate upwards. The crate has a mass of 120 kg and the coefficient of static and kinetic friction between the crate and surface is 0.60 and 0.50, respectively. The crate starts from rest and the surface is measured 30° from the horizontal. If the pulley exerts a tension T = 1220 + 200t, a. What is the impulse applied to the crate during the first second of motion? b. After 1 second, what is the velocity of the crate? c. Compute the power transmitted to the winch after the first second.

Than man with 65 kg weight poorly navigates the bunny slopes. The man reaches the bottom of the hill traveling 5.0m/s and stops by hitting a snow bank. If the snow bank bring the man  to rest in 0.40s what is the impulse force the skier experiences?

A 500-kg car traveling east at 30.0 m/s collides with an 800-kg truck traveling north at 20.0 m/s at an intersection. The two vehicles stuck together after the collision. The coefficient of sliding friction between both vehicles and the road is 0.300. Assume that the collision takes place on a level road. 1. Which of the following statements is FALSE? The kinetic energy of the system is not conserved during the collision. The friction between the vehicles and the road affects the motion of the vehicles after collision. The momentum of the car after the collision is equal to the vector sum of the momentum of the car before the collision and impulse exerted by the truck to the car during the collision. The final speed of the combined mass after the collision is equal to the sum of the initial speeds of the car and the truck. 3. Which of the following best approximates the magnitude of the IMPULSE EXERTED BY THE CAR TO THE TRUCK during the collision?