Question

What is the momentum of an object having mass of 14 kg and velocity 28 m/s?
1. 1/392 kg-m/s
2. 2 kg-m/s
3. 0.5 kg-m/s
4. 392 kg-m/s

Answer 1

Correct Answer - Option 4 : 392 kg-m/s

​The correct answer is 392 kg-m/s.​

• The momentum of a particle is a measure of the time required for a constant force to bring it to rest.
•  In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object.
  • Momentum = Mass * Velocity
• In physics, the symbol for the quantity momentum is the lower case p. Thus, the above equation can be rewritten as p = m • v.
• Momentum is a vector quantity; i.e., it has both magnitude and direction.

• Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle.
• Conservation of momentum can be described by P1 (before) + P2 (before) = P1 (after) + P2 (after).
• Some of the examples of momentum include - 
  • A train moving at 100 km/h.
  • A bullet fired from a gun.
  • A baseball flying through the air.