Impulse & Momentum

An impulse depends on

• weight and force

• force and time

• electric charge and time

• none of these

An object having a p_i of 30kg m/s has ended with a p_f of 40 kg m/s. What impulse caused this?

• 2kg m/s

• 10kg m/s

• 70kg m/s

• 5kg m/s

An object has pi of 20 kgm/s and then pf of 30 kgm/s. If it took 2s, what is the force?

• 10N

• 4N

• 5N

• 50N

An object has Pi of 20 kgm/s ends with a Pf of 40 kgm/s. How long would a 5N force need to act?

• 3s

• 8s

• 7s

• 4s

An object with 20kgm/s is stopped by a force of -20N, how long does it take to do this?

• 2s

• 1s

• 4s

• 5s

An egg gets dropped from a height of 0.1 meters and cracks. A second egg gets dropped from the same height but this time it lands on a glass of water and does not break. In terms of impulse.

• 1st egg experienced more impulse

• 2nd egg experienced more impulse

• both experienced the same impulse

An egg gets dropped from a height of 0.1 meters and cracks. A second egg gets dropped from the same height but this time it lands on a glass of water and does not break. In terms of force and time, the second egg must have experienced...

• more force, but less time

• less force, but more time

• more force, and more time

• less force, and less time

You find that an objects final momentum is 45kg m/s, and the impulse that caused this was 45kg m/s, what must have been the objects initial momentum?

• 45kg m/s

• 0 kg m/s

• 22.5kg m/s

• need more information

Which has more momentum?

• A parked semi truck

• A moving car

• they have the same amount of momentum

A bicycle has a momentum of 24 kg•m/s. What momentum would the bicycle have if it had twice the mass and was moving at the same speed?

• twice the momentum; 48 kg*m/s

• 1/2 the momentum; 12 kg*m/s

• 4x the momentum; 96 kg*m/s

• 1/4 the momentum; 6 kg*m/s