a) momentum. b) energy c) speed. d) all of the above. 50. Does a car hoisted for

Question

a) momentum. b) energy c) speed. d) all of the above. 50. Does a car hoisted for repairs in a service station have increased potential energy relative to the floor? a) yes b) no c) sometimes d) not enough information 51. The test was a) very easy. b) easy. c) difficult. d) very difficult. 52. Any teacher that gives a test like this should be a) given a trip to Iceland. b) given a trip to Iceland and the Gulf Coast. c) given a trip to Iceland, the Gulf Coast, and Alaska. d) given a trip to Iceland, the Gulf Coast, Alaska, and Australia.

Explanation / Answer

50.(a) yes

potential energy of the raised car would be more compared to floor and the differnce will be m x g x h , where m = mass,g =9.8m/s2 , h = raised height

51. (c) difficult

It has no meaning of very difficult .Difficult in its own shows the toughness.

52. (a) given a trip to iceland.

Since here the trip is given one so only one place should be acceptable.

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