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1AbQuiz3

# 1AbQuiz3 - Physics 1A(b Fall 2006 Quiz 3 Version D 1 Closed...

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Physics 1A (b) Fall 2006: Quiz 3 Version D 1 10.29.06 Closed book. No work needs to be shown for multiple-choice questions. 1 . Which of the following is an example of a non-conservative force? a. gravity b. spring force c. friction d. Both choices A and B are examples. 2 . I drop a 60-g golf ball from 2.0 m high. It rebounds to 1.5 m. How much energy is lost? a. 0.88 J b. 0.50 J c. 1.0 J d. 0.29 J 3 . The unit of work, joule, is dimensionally the same as: a. newton-meter. b. newton/kilogram. c. newton-second. d. newton/second. 4 . A horizontal force of 100 N is applied to move a 45-kg cart across a 9.0-m level surface. What work is done by the 100-N force? a. 4 500 J b. 405 J c. 500 J d. 900 J 5 . An amount of work equal to 1.5 J is required to compress the spring in a spring-gun. What is the “launch speed” of a 15-g marble? a. 18 m/s b. 14 m/s c. 21 m/s d. 15 m/s

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Physics 1A (b) Fall 2006: Quiz 3 Version D 2 10.29.06 6 . A 15.0-kg crate, initially at rest, slides down a ramp 2.0 m long and inclined at an angle of 20 ° with the horizontal. If there is no friction between ramp surface and crate, what is the
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1AbQuiz3 - Physics 1A(b Fall 2006 Quiz 3 Version D 1 Closed...

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