When is the work done in the following situation :
1.A girl pushing a wall
2. A boy carrying a suitcase ibn h is hand.
3. A stone falling freely
4. A boy climbing up the stairs
1.A girl pushing a wall
2. A boy carrying a suitcase ibn h is hand.
3. A stone falling freely
4. A boy climbing up the stairs
- A(i) and (ii)
- B(i) and (iii)
- ✓(ii) and (iv)
- D(iii) and (iv)
Answer: C.
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