Question

4.
4
" 2
7. A boy standing at the top of a tower of 20 m height drops a stone Assuming g=10ms?, the
velocity with which it hits the ground is
2) 40 ms
3) 5 ms
4) 10 ms
1) 20 ms​

Answer 1

Answer:

v²-u²=2as

as u=0

v²=2×10×20

v²=400

v=20m/s