Two particles move in the same straight line starting at the same moment from the same point in the same direction. The first moves with constant velocity u and the second starts from rest with constant acceleration f. Then,
- Athey will be at the greatest distance at the end of time $${u \over {2f}}$$ from the start
- Bthey will be at the greatest distance at the end of time $${u \over f}$$ from the start
- Ctheir greatest distance is $${{{u^2}} \over {2f}}$$
- Dtheir greatest distance is $${{{u^2}} \over f}$$
✓ Correct answer: B
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