In a crash test, a car of mass 1.41×10^3 kg collides with a wall and rebounds. The initial and final velocities of the car are vi=−15.4 m/s and vf=2.87 m/s, respectively. If the collision lasts for 0.154 s, find the following. a. The impulse delivered to the car due to the collision.
b. The size and direction of the average force exerted on the car (Indicate the direction with the sign of your answer.)
c. Suppose the car doesn't rebound off the wall, but the time interval of the collision remains at 0.158 s. In this case, the final velocity of the car is zero. Find the average force exerted on the car. (Indicate the direction with the sign of your answer.)