A ball is thrown vertically downward with a velocity of 20 m s - 1 from the top of a tower. It hits the…

A ball is thrown vertically downward with a velocity of 20 m s-1 from the top of a tower. It hits the ground after some time with a velocity of 80 m s-1. The height of the tower is: g=10 m s-2
  1. 340 m
  2. 320 m
  3. 300 m
  4. 360 m

Solution

We know that, 

v2=u2+2gh
⇒802=202+2×10h
⇒h=300 m

Asked in: NEET 2020 (Phase 1)

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