Question

A bullet of mass 20 g is moving with a velocity of 50 m/s find its kinetic energy in kilojoules

Answer 1

Answer: 0.025 kJ

Explanation:

Given:

☛ Mass of Bullet, m = 20 g

Convert into kg

we get, mass m = 0.02 Kg

☛ Velocity of Bullet, v = 50 m/s

To Find:

☛ Kinetic Energy of the Bullet in Kilojoules

Solution:

We know,

➜ Kinetic Energy = mv² / 2

☛ K.E = 0.02 × 50² / 2

☛ K.E = 0.01 × 2500

☛ K.E = 25 Joules

Since, 1 KiloJoule = 1000 Joules

So, Your answer in Kilojoules is 0.025 kJ