5. When a body throw up, work done by radial force on the body is
(1 Point)
zero
Positive
negative
cannot say
Answers
Answered by
1
Hey Mate.
your answer is (B) Negative.
Answered by
0
Given:
When a body throw up.
To Find:
work done by radial force on the body is?
Solution:
here, it is given that , the body is thrown up.
therefore, a force () due to gravity is acting on the body in downward direction.
Since, we know that -
work done on body is given by;
since, here both force due to gravity and displacement of the body are in opposite direction, i.e., angle between them is 180 degree.
therefore,
since, cos(π) = -1 and here, d is the displacement of the body.
Hence, work done by radial(gravitational) force on a body when it thrown up is negative.
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