SI units for momentum of an object is ________.

The correct answer is kg ms-1.

Key Points

• The SI unit for momentum is kg ms-1 .
  • Newton's second law of motion in terms of momentum states that the net external force equals the change in momentum of a system divided by the time over which it changes.
• Momentum can be defined as "mass in motion."
  • All objects have mass; so if an object is moving, then it has momentum - it has its mass in motion.
  • The amount of momentum that an object has is dependent upon two variables: how much stuff is moving and how fast the stuff is moving
  • Momentum depends upon the variables mass and velocity.
  • 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
• Hence, the correct option is 2

Additional Information 

• Impulse
  • These concepts are merely an outgrowth of Newton's second law as discussed in an earlier unit.
  • Newton's second law (Fnet = m * a) stated that the acceleration of an object is directly proportional to the net force acting upon the object and inversely proportional to the mass of the object.
  • Impulse = Change in momentum