When released from a height a ball falls 5m in 1s. In 4s after release the ball will fall:
Correct answer: B. 80m
- A. 40m
- B. 80m
- C. 20m
- D. 100m
Explanation
Since,s = ut + ½ at²u = 0, a = gt = 4sg ≈ 10 ms-²Then,s = (0)(4) + ½ (10)(4)²s = 0 + ½ (10)(16)s = ½ (160)s = 80m
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