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3 years ago

10

calculate the height from which a body is released from rest if its velocity just before hitting the ground is 30 metre per seco

nds

1 answer:

Anna71 [15]3 years ago

5 0

Answer:

height is 45 metres

Explanation:

KE=PE

¹/²mv² = mgh

¹/²v² = gh

but v =30m/s

(30)² / 2 =10h

450=10h

h = 45m

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