Physics homework question?

Posted on 2014-12-27 06:28:00 in Physics by SHAMBHAVI

Q. A body of mass 0.3 kg is taken up an inclined plane of length 10 and height 5 m and then allowed to
slide down to the bottom again. the coefficient of friction between the body and the plane is 0.15.
What is the

1. The work done by the gravitational force over the round trip is
(A) 1 (B) zero
(C) 2 (D) 3

2. The work done by the applied force over the upward journey is

(A) 17.5 J (B) 16.5 J
(C) 18.5 J (D) 15.5 J

3. The work done by frictional force over the round trip is

(A) -5.6 J (B) -7.6 J
(C) -8.5 J (D) -3.4 J

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