Question

a body Falls freely from rest from a height of 15 metres find the speed with which it strikes the ground and the time it takes to reach the ground ​

Answer 1

Answer:

Speed at which it strikes the ground is 10√3 meter/sec. Time taken is √3 seconds

Explanation:

v^2 = u^2 + 2as

v^2 = 0^2 + 2*g*15

v^2 = 2*10*15

v^2 = 300

v = √300

v = √(3*100)

v = 10√3

Speed at which it strikes the ground is 10√3 meter/sec.

v = u + at

10√3 = 0 + g*t

10√3 = 10*t

√3 = t

Time taken is √3 seconds