Physics

Kinetic Energy

Formula

KE = ½ × m × v²

What is Kinetic Energy?

Kinetic energy is the energy an object possesses due to its motion. It is proportional to both mass and the square of velocity, meaning doubling the speed quadruples the kinetic energy.

Variables

K
KE — Kinetic energy (in Joules)
m
m — Mass (in kilograms)
v
v — Velocity (in m/s)

Worked Examples

Example 1

Find the kinetic energy of a 2 kg ball moving at 10 m/s.

Solution:

KE = ½ × 2 × 10² = ½ × 2 × 100 = 100 Joules

Frequently Asked Questions

Related Formulas

Newton's Second Law

F = m × a

Gravitational Potential Energy

PE = m × g × h

V = I × R

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