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Concepts
Momentum
Impulse
Collisions
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100
What is the equation for momentum?
p=mv
100
If you decrease the velocity does the momentum increase or decrease?
decrease of momentum
100
There are 3 equations that we've used dealing with impulse. For every correct one you list you get 100 points, for every incorrect one you list lose 100 from this question only.
impulse=(delta)p, impulse=Ft, Ft=(delta)mv
100
What is conserved in a collision?
Momentum
100
When objects push away from each other, momentum is....
conserved
200
Define the units for momentum, impulse and force.
Momenutm=kgm/s Impulse=Ns Force=N
200
A person carrying groceries doubles their velocity but halves their mass when her groceries fall to the floor. What happened to their momentum?
Their momentum is the same.
200
What is equal to the change in momentum?
impulse
200
Two bumper cars head towards each other and experience an elastic collision. Car 1 has a mass of 500 kg and Car 2 has a mass of 650 kg. Car 1 has an initial velocity 5 m/s and Car 2 had an initial velocity of -3 m/s. Car 2 had a final velocity of 2 m/s. What is the final velocity of Car 1?
-1.5 m/s
200
If we are given a weight, what do we need to do BEFORE solving for momentum?
mass
300
Which has greater momentum: a train at rest or a moving skateboard? Explain
The moving skateboard since the train has no velocity and p=mv it would have no momentum.
300
Determine the momentum of a ... 1000-kg car moving northward at 20 m/s. Show work.
What is : p = m*v = 1000 kg*20 m/s p = 20 000 kg•m/s, north
300
If a 2N force is aplied on an object for 10 seconds what is the Impulse
20Ns
300
Assuming that the collision between Train 112 and Train 214 is a perfect elastic collision, (no damage done to either train) Train 112 has an initial velocity of 19.7 m/s & a mass of 144,000 kg Train 214 has a mass of 108,000 kg and is at rest. Calculate the final velocity of Train 214 after the collision if Train 112 has a final velocity of 5 m/s.
19.5 m/s
300
A 3.9kg bowling ball rolls and hits a 1.6 kg pin at rest. After the ball stops and the pin moves with a velocity of 8 m/s. How fast was the bowling ball moving?
3.28 m/s
400

List 2 examples of an elastic collision.

basketball bouncing pool tennis

400
According to the Guinness Book of World Records, the fastest recorded baseball pitch was delivered by Nolan Ryan in 1974. The pitch was clocked at 100.9 mi/hr (45.0 m/s). Determine the momentum of a 0.145-kg baseball.
hat is: p = m*v = 0.145 kg*45.0 m/s p = 6.52 kg•m/s)
400
What is the change in momentum of of 1kg object with an initial velocity of 2 m/s and a final velocity of 7m/s?
5kgm/s
400
Explain the differences between an elastic collision, an inelastic collision, and an explosion.
ellastic collision-two things bounce off inellastic-two or more things stick together explosion- one item breaks into multiple items;
400
A .095kg snowball hits a 9.2 kg dog. After the dog and the snow move with a velocity of 1.6 m/s. What is the snowball's velocity?
156.5 m/s
500
Why doesn't an egg break when thrown on a sheet?
The sheet gives so the egg has more time to slow down reducing the force it feels.
500
If you increase the momentum does the mass or velocity increase?
either
500
A 3kg object slows from 62m/s to rest in 20 seconds. What force does it feel?
-9.3 N
500

A whale with a mass of 1530 kg is moving at 5m/s to the right when it eats Dory and Marlin (combined mass of 2kg) who were moving 19 m/s to the left. What is their combined velocity after he eats them? (answer must be to the nearest thousandth)

5.018 m/s 

500
A whale with a mass of 5681 kg moves with a velocity of 8 m/s. He then sneezes out a fish of mass 9kg who moves at 598m/s. What is the whales new velocity?(Answer should be to the nearest hundredth.
7.07