| DIRECTION: In the following questions, more than one of the answers given are correct. Select the correct answers and mark it according to the following codes: |
| Codes |
| Choose the correct options - |
| (1) The work done by forces may be equal to change in kinetic energy |
| (2) The work done by forces may be equal to change in potential energy |
| (3) The work done by forces may be equal to change in total energy |
| (4) The work done by forces must be equal to change in potential energy. |
A) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
[a] [a] The work done by all forces equal to change in kinetic energy [b] The work done by conservative forces equal to change in potential energy [c] The work done by external and nonconservative forces equal to change in total energy
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