Motion in a Straight Line - Result Question 44

46. A body is thrown vertically upward from the ground. It reaches a maximum height of 20m in 5 sec. After what time, it will reach the ground from its maximum height position?

(a) 2.5sec

(b) 5sec

(c) 10sec

(d) 25sec

[1995]

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Answer:

Correct Answer: 46. (b)

Solution:

  1. (b) hmax=20m and t=5sec. Time taken by the body to reach the ground from some height is the same as taken to reach that height. Therefore, time to reach the ground from its maximum height is 5sec.


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