7. A unit for impulse is A. kgms B. kgm/s C. kgs/m D. kgm/s 2

8. If you have double the force and half the time over which the force acts, the resulting impulse A. is halved B. doubles C. remains the same D. increases four times

9. To change the momentum of a moving object by a greater amount, exert A. the same force on the object over a longer period of time B. a smaller force on the object over the same time C. a smaller force on the object over a shorter time D. the same force on the object over a shorter period of time

A truck hits a brick wall with a force of 100 000 kgm/s 2 . The truck comes to a stop in 0.5 s. Calculate the impulse the truck experienced.