Momentum

Mediumphysics

A body of mass 2 kg moving with a velocity of 10 m/s collides with another body of mass 3 kg at rest. If they stick together after collision, what is their common velocity?

Select the correct option:

4 m/s

5 m/s

6 m/s

3 m/s

🔒 Solution Hidden from View

Submit your answer to unlock the detailed step-by-step solution.

About This Question

Subject: physics
Chapter: laws of motion
Topic: momentum
Difficulty: Medium
Year: 2025

Solution

Correct Answer:

4 m/s

Collision Type: This is a 'completely inelastic collision' where kinetic energy is not conserved, but momentum is.
Momentum Before: $m_{1} u_{1} + m_{2} u_{2} = (2 \times 10) + (3 \times 0) = 20$ kg·m/s.
Momentum After: $(m_{1} + m_{2}) v = (2 + 3) v = 5 v$ .
Conservation Law: $5 v = 20$ .
Result: $v = 4$ m/s.

This medium difficulty physics question is from the chapter laws of motion, covering the topic of momentum. It appeared in the 2025 exam.

Looking for more practice? Explore all physics questions or browse laws of motion questions on RankGuru.

Rank Guru

Momentum

Select the correct option:

Solution

🔒 Solution Hidden from View

More momentum Practice Questions

A skater decreases moment of inertia from 4 to 1 kg·m². Initial ω = 3 rad/s. Final ω?

Direction of angular momentum of a particle in uniform circular motion?

A 0.15 kg ball moving at 20 m/s is stopped by a catch in 0.05 s. What average force is exerted by th...

Photon momentum p equals?

Particle momentum in terms of de Broglie wavelength λ?

A figure skater with arms extended has a moment of inertia of 4 kg·m² and rotates at 2 rad/s. When s...

About This Question

Solution