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Momentum

From classical mechanics to quantum field theory, momentum is the Universe's preferred language to describe motion. Learn here about momentum, its conservation, and how it captures our intuitions.

Impulse and Change in Momentum

A soccer ball of mass \(0.5\text{ kg},\) initially at rest, is kicked by a force of magnitude \(1200\text{ N}\) for \(15\text{ ms}.\) What is the velocity of the ball after the kick?

A water-rocket of mass \(2\text{ kg}\) blasts off from the ground. The lifting force applied on the rocket by the water is \(24\text{ N},\) and the air resistance is negligible. Assuming that the mass of the water-rocket does not change, how fast will the rocket be after \(5\) seconds?

The gravitational acceleration is \(g=10\text{ m/s}^2.\)

A man pushes a moving ball on a frictionless floor. If the man pushes with magnitude \(11\text{ N}\) for \(5\) seconds, what is the change of momentum the ball experiences?

Tiger Woods can hit a golf ball quite hard. A golf ball just after being hit by Mr. Woods has a kinetic energy of \(100~\mbox{J}\) and a momentum of \(3~\mbox{kg m/s}\). What is the mass of the golf ball in grams?

A golfer strikes a golf ball of mass \(0.04\text{ kg}\) with a force of magnitude \(400\text{ N}.\) If the time of impact between the golf club and the ball is \(3\text{ ms},\) what is the velocity of the ball after the strike?

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