18. As the angle of a wheelchair ramp is changed from 15" to 12" a. The AMA will increase. b. The IMA will increase. c. The AMA will decrease. d. The IMA will decrease. For any machine, as the friction of the moving parts increase 19. a. the AMA and the % efficiency decrease. b. the AMA and the % efficiency increase. c. the AMA increases but % efficiency decreases. d. the AMA decreases but % efficiency increases. 20. If the load gear in a set of gears is replaced by a gear with less teeth, then a. The IMA will increase. b. The IMA will decrease. C. The IMA will not change because it is only affected by the size of the force. d. The IMA will not change because it is only affected by the speed of the gears.

18. As the angle of a wheelchair ramp is changed from 15" to 12" a. The AMA will increase. b. The IMA will increase. c. The AMA will decrease. d. The IMA will decrease. For any machine, as the friction of the moving parts increase 19. a. the AMA and the % efficiency decrease. b. the AMA and the % efficiency increase. c. the AMA increases but % efficiency decreases. d. the AMA decreases but % efficiency increases. 20. If the load gear in a set of gears is replaced by a gear with less teeth, then a. The IMA will increase. b. The IMA will decrease. C. The IMA will not change because it is only affected by the size of the force. d. The IMA will not change because it is only affected by the speed of the gears.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 21RQ

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