A hockey puck of mass 150 g is sliding due east on a frictionless table with a speed of 10 m/s. Suddenly, a constant force of magnitude 5 N and direction due north is applied to the puck for 1.5 s. Find the north and east components of the momentum at the end of the 1.3-s interval.

The front 1.20 m of a 1,450-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 26.0 m/s stops uniformly in 1.20 m, how long does the collision last? (b) What is the magnitude of the average force on the car? N (c) What is the magnitude of the acceleration of the car? Express the acceleration as a multiple of the acceleration of gravity. |9

A horizontal force of 12 N pushes a 0.50-kg book against a vertical wall. The book is initially at rest. If   = 0.60 and  = 0.50, the acceleration of the book is (in meter per second squared)

The front 1.20 m of a 1400 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 22.0 m/s stops uniformly in 1.20 m, how long does the collision last? s(b) What is the magnitude of the average force on the car? N(c) What is the acceleration of the car? Express the acceleration as a multiple of the acceleration of gravity. (Indicate the direction with the sign of your answer.) g

You have been called to testify as an expert witness in a trial involving a head-on collision. Car A weighs 1515 lb and was traveling eastward. Car B weighs 1125 lb and was traveling westward at 43.0 mph. The cars locked bumpers and slid eastward with their wheels locked for 20.5 ft before stopping. You have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750. How fast (in miles per hour) was car A traveling just before the collision? (This problem uses English units because they would be used in a U.S. legal proceeding.) speed of car A: mph

A 2180-kg car is slowed down uniformly from 24.6 m/s to 5.2 m/s in 3.83 s. (a)What is the magnitude of the average total force acted on the car during this time? (b)How far did the car travel during this time?

Question 5: A ball of mass m collides with a wall with initial velocity -voj (and then it rebounds). The force acting on the ball by the wall during the collision is given by F = (At + Bt²)j where A and B are positive constants. Find the velocity of the ball after the collision. The ball is in contact with the wall 10-2 seconds (Assume that the gravitational force is negligible compared with force F).

The front 1.20 m of a 1,550-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 22.0 m/s stops uniformly in 1.20 m, how long does the collision last? (b) What is the magnitude of the average force on the car? (c) What is the magnitude of the acceleration of the car? Express the acceleration as a multiple of the acceleration of gravity. Need Help? Read It Master It A1 160.0 kg car traveling initially with a speed of 25.000 m/s in an easterly direction crashes into the back of a 8 400.0 kg truck moving in the same direction at 20.000 m/s. The velocity of the car right after the collision is 18.000 m/s to the east. Before After (a) What is the velocity of the truck right after the collision? (Give your answer to five significant figures.) 4.0 m/s east (b) What is the change in mechanical energy car-truck systemi the collision? (c) Account for this change in mechanical energy.

The front 1.20 m of a 1,450-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 21.0 m/s stops uniformly in 1.20 m, how long does the collision last? (b) What is the magnitude of the average force on the car? (c) What is the magnitude of the acceleration of the car? Express the acceleration as a multiple of the acceleration of gravity. Need Help? Read It Master It