Question

A pebble is thrown vertically upwards with A speed of 20m /s. how high will it be after 2 s?

Answer 1

initial speed ,u = 20
Downward acc = - 10
Time = 2 sec
Distance before coming to rest =
ut + 1/2 gt sq.
20× 2 + 1/2 (-10)2×2
40- 20
20
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Answer 2

Answer:

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