Question

A body of mass 5kg falls from a height of 10 m from earth surface the kinetic energy of the body on the earth will be

Answer 1

Answer:

500J

Explanation:

Answer 2

The answer will be 490 J EXPLANATION : we have mass = 5kg, and height = 10m so, by using 3nd equation of motion we can find the velocity of that body v^2 = u^3 + 2as

v^2 = 0^2 + 2 × 9.8 × 10

v^2 = 196

Now, we can find the kinetic energy of tha t body

K.E. = 1/2 mv^2

K.E. = 1/2 × 5 × 196

K.E. = 98 × 5

K.E. = 490 Joules