Momentum and Impulse- Review

Momentum and Impulse- Review

Momentum

• Quantity of motion

• p=mxv

• Describe an instance where two objects can have the same momentum

Fill in the Blanks

A 1200 kg car is driven through town with a speed of 15 m/s. What is the magnitude of the car's momentum?

Open Ended

A bean bag and ball are each 1 kg. both fall to the earth at 4 m/s. The beanbag stops, the ball bounces back up.Which will have the greater change in momentum? Why?

Momentum

• The momentum in a system is a vector sum.

• This means that multiple objects in a system can either increase or decrease the system.

Open Ended

Describe a system where multiple objects increase the momentum in a system.

Impulse

• Described two ways

• 1. Force acting for a time. I= F x t

• 2.Impulse is change in momentum.

•  $I=\ \Delta p$  

•  $\Delta p\ =\ F\Delta t$  

•  $m\Delta v=F\Delta t$  

Fill in the Blanks

A force acts on a bicycle for 12 s and changes its momentum from 15 kg m/s in the positive x direction to 38 kg m/s in the positive x direction. What are the magnitude and the direction of the force?

Fill in the Blanks

An impulse of 12.2 kg m/s is delivered to an object whose initical momentum is 4.5 kg m/s. The impulse has the same direction as the initial momentum. What is the object's final momentum?

Open Ended

If you dropped an egg from 3m high how would you keep it from breaking? Explain your reasoning.