Question

a body is thrown up with the kinetic energy of 10 joule .if it attains a maximum height of 5 m find the mass of the body. 0 0.1 kg 0.2 kg 0.3 kg

Answer 1

Answer:

m=gh10=10×510=0. 2 kg.

Explanation:

Here, kinetic energy of the body, K.E=10 JEk=10J

Height attained by the body, h=5 m

h=5m

When the body attains maximum height, its kinetic energy is converted into potential energy.

P.E=K.E

⟹mgh=10

⟹m=

gh

10

=

10×5

10

=0.2 kg