A tennis ball of mass 50g is hit against a wall. It hits the wall going right at 5 ms" and rebounds to the left at 4 ms 1. What is the change in momentum of the tennis ball? Select one: O a. 45 kg m/s left O b. 0.05 kg m/s right O c. 0.05 kg m/s left O d. 0.45 kg m/s right O e. 0.45 kg m/s left A tennis ball of mass 50g is hit against a wall. It hits the wall going right at 5 ms" and rebounds to the left at 4 ms", changing its momentum by 0.45 kg m/s left. If the ball is in contact with the wall for 0.2 s what is the average force applied by the wall on the ball (your answer is a vector)? Select one: O a. 2.25 N Left O b. 0.09 N Left O c. 0.45 N Right O d. 0.45 N Left O e. 2.25 N Right A tennis ball of mass 50g is hit against a wall. It hits the wall going right at 5 ms" and rebounds to the left at 4 ms"', changing its momentum by 0.45 kg m/s left. The ball is in contact with the wall for 0.2 s and experiences an average force of 2.25 N left (applied by the wall). What is the force of the ball on the wall? Select one: O a. ON Left O b. 0.2 N Left O c. 2.25 N Right O d. 0.45 N Left O e. 2.25 N Left At a crash test facility scientists run a car of mass m into a wall at a velocity v. The car comes to rest following the collision. The experiment is repeated several times at the same velocity for several different cars (all of mass m). Given that the mass of the cars and the velocity of the cars are all the same, what aspect of the collision can a car designer try to change to reduce the average force applied to the car (and hence to the occupants of the car)? Select one: O a. Momentum of the cars O b. Duration of the collision O c. The force of the wall on the ground O d. Force of the car on the ground O e. Change in momentum of the cars At a crash test facility scientists run a car of mass m into a wall at a velocity v. The car comes to rest following the collision. The experiment is repeated several times at the same velocity for several different cars (all of mass m). Given that the mass of the cars and the velocity of the cars are all the same, the only way to alter the average force exerted on the passenger is to change the duration of the collisions. Which of the following features of cars/roads act to increase the collision time directly (i.e. while a collision is occurring)? Select one or more: O a. Water/sand Barrels b. Headlights O c. Anti-lock brakes O d. Air Bags ne. Crumple Zones