Question

2. A body is moving horizontally at a height of 10 m has its P.E equal to K.E.
Then velocity of that body is (g = 9.8 m/s2)__-------__m/s.
LEVEL-2 & 3
le correct Choice Type:​

Answer 1

Explanation:

Potential energy of a body is given by :

P=mghP=mgh

Kinetic energy of the body is given by :

K=\dfrac{1}{2}mv^2K=

2

1

mv

2

Height, h = 10 m

A body moving horizontally at a height of 10 m has its potential energy equal to kinetic energy. So,

mgh=\dfrac{1}{2}mv^2mgh=

2

1

mv

2

v=\sqrt{2gh}v=

2gh

v=\sqrt{2\times 9.8\times 10}v=

2×9.8×10

v = 14 m/s

So, the velocity of the body is 14 m/s. Hence, this is the required solution.