Q. |
Consider the following statements
1. When a coolie carrying a load on his head moves on a horizontal platform, the work done by the coolie against gravity is zero.
2. When a satellite revolves in a circular orbit around the earth, the work done by the gravitational force on the satellite is zero.
3. When a body falls freely under gravity, the work done by gravity is negative.
4. Work is a scalar quantity.
Which of the statement(s) given above is/are correct? |
(a)1 and 2  | | (b)2 and 3 | | (c)only 4 | | (d)1, 2 and 4 |
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