Question

3 kg stone falls from 20m high platform Find its Falling speed at 10m height.​

Answer 1

Answer:

14 m/s

Explanation:

Initial velocity is 0 ( at rest ).

u = 0 m/s

At 10m height it would have travelled 20-10 = 10m.

s = 10 m

Acceleration due to gravity is 9.8 m/s^2.

a = 9.8m/s ^2

We have to find final velocity, v.

v = ?

Using third equation of motion,

v² - u²= 2as

v² - (0)² = 2 x 9.8 x 10

v² = 196

√(v²) = √(196)

v = 14 m/s