Question

A child drops a coin from the top of the building which is 50m high, calculate the velocity if it falls 20 m distance​

Answer 1

Answer:

20 m/s

Step-by-step explanation:

Here u = 0 m/s, s = 20m, a = 10 m/s^2

by Newton's third law,

v^2 = u^2 +2as

v^2 = (0)^2 + 2× 10 × 20

v^2 = 0 + 400

v^2 = 400

v = √400 = 20 m/s