1. A 1.27-kg cannon is loaded with a 54-gram tennis ball and placed on the floor. A photogate measurement determines that the cannon recoiled backwards with a speed of 7.8 m/s. Determine the speed of the ball.

a. 150 m/s

b.180m/s

c.120 m/s

d. 90 m/s

2.What is the impulse on a 2000 kg truck whose velocity changes from 0 m/s to 19.5 m/s?

a. 19,500 N-s

b.39,000 N

c.39,000 N-s d. 2,000 kg

3.A car travels with a velocity of 50 kph (km/h). Its momentum is 2 x 10⁴ kg.m/s. What is the mass of the car?

a. 1439kg

b. 1735kg

c. 1349kg

d. 1267kg

4.In this elastic collision two bowling balls each of mass 5.0 kg travel in opposite directions toward each other. Ball A has a velocity of 2.0 m/s and Ball B has a velocity -5.0 m/s. If after the collision Ball B has a velocity of -1.0 m/s, what is the velocity of Ball A after the collision?

a. -2

b. -3

c. 2

d. 1