Multiple Choice - Use a capital letter that best completes the statement or answers the question [10 marks] 1. Which of the following is not a unit of cucrgy? d. W.s b. kg . m] / =] c. kg.m /s C. N.m 2. As a student lifts a 4.5-ke book bag 120 cm into the air, the amount of work that the force of gravity docs o the bag is a 5.4J d -5.4J b 53 ] e. 53 J 540 J A B C E 3. A race is set up with five balls placed at the top of the five ramps shown below and released at the same instant Each ramp drops the same vertical height. That ramp that will allow the ball to arrive at the bottom Last is a. A d. b. B c. E C. C 4. A 5.0-kg cal travelling al 1.3 m/'s has a momentum of a. 6.5 m's |1!| d. 3.8 m/'s [ WI b. 6.5 m's [W] C. none of the above c. 3.8 m's [H]