Question

A boy standing at the top of tower 20 metre height drop a stone

Answer 1

Hey Dear,

# Complete question -

Q. A boy standing at the top of a tower of 20 m height drops a stone. Assuming g = 10 m/s², the velocity with which it hits the ground is ?

◆ Answer -

v = 20 m/s

◆ Explaination -

# Given -

h = 20 m

g = 10 m/s^2

u = 0 m/s

# Solution -

When a stone is dropped from tower -

v^2 = u^2 + 2g.h

v^2 = 0^2 + 2×10×20

v^2 = 400

v = √400

v = 20 m/s

Hence, the stone hits ground with velocity of 20 m/s.

Thanks dear.