Question

find its kinetic energy

Answer 1

v=u+at. here u is zero
so v=at=10*5=50
so K.E is 1/2 mv^2
=1/2*1*50^2
=1250 J

Answer 2

Answer:

1250J

Explanation:

Given: Mass = 1kg, Time = 5s, Initial Velocity (u) = 0m/s

Let gravitional acceleration be 10m/s2

K.E = mv^2/2

To find v,

v = u+at (1st equation of motion)

v = 0 + 10*5 = 50m/s

Kinetic Energy,

$mv^{2} /2$

= 1 * 2500/2

= 1250J

Therefore Kinetic Energy of the stone = 1250J