An object of mass 1 kg is moving a velocity 10 m/s. Find the kinetic energy of the object.

Question

Question

This question was previously asked in

RRB ALP Electrician 22 Jan 2019 Official Paper (Shift 1)

Answer 1

CONCEPT:

Kinetic energy (K.E):

The energy possessed by a body by virtue of its motion is called kinetic energy.
The expression for kinetic energy is

\(KE = \frac{1}{2}m{v^2}\)

Where m = mass of the body and v = velocity of the body

CALCULATION:

Given:

Mass (m)= 1 kg.

Velocity (v)= 10 m/s.

The equation of Kinetic Energy is given by,

Kinetic Energy = \({1 \over 2}\times {m \times v^2}\)

\(Kinetic Energy= {1\over2}\times{1 \times 10^2}={100\over2}=50 J\)

∴The Kinetic Energy of the object is 50 J.

∴ The correct option is the 4^th.