Show:
Momentum
Impulse & Change in Momentum
Conservation of Momentum
1D & 2D Kinematics
Forces, Circular Motion, & Gravitation
100
An 3 kg object is traveling 25 m/s right before it hits the ground. Calculate the momentum.
What is 75 kg m/s?
100
This is the velocity of a 2 kg object after being acted on by 10Ns of impulse.
What is 5 m/s?
100

In terms of collisions, the Conservation of Momentum states...

What is "total momentum before the collision = total momentum after collision"?

100

If an object is accelerating, the object is NOT:

a. speeding up in a straight line path

b.  slowing down in a straight line path

c. traveling at constant speed in a straight line path

d. turning in a circular path

What is "c. traveling at constant speed in a straight line path"?

100

An object is in equilibrium if the forces...

What is "are balanced"?

200

The difference between inertia and momentum is that object can only have momentum if...

What is "the object is moving"?

200
Compare impulse to the change in momentum
What is the same?
200
When objects exert forces on each other what happens to the momentum of the system
What is conserved?
200

If an object is falling freely, the magnitude of the acceleration is...

What is "9.81 m/s2"?

200

Centripetal means _____________ which means a and F in circular motion point ___________.

What is "center seeking" and "point to the center"?

300
A 10kg ball is fired with a velocity of 500 m/s from a 1000kg cannon. This is the recoil velocity of the cannon
What is 5 m/s?
300
Calculate the time required to stop a 1000 kg car moving 10 m/s with a 5000 N force.
What is 2s?
300
True or false, a 5 kg object in free fall has the same momentum when it started falling as it does just before it stops.
What is false. Bonus for 100 points, compare the inertia of when it starts to just before it stops.
300

TRUE OR FALSE: the mass and weight represent the same thing.

What is "FALSE"?

400
If a 2 kg object is traveling 15 m/s and is hit from behind with a forward impulse of 200 Ns this is the change in momentum of the object.
What is 200 kg m/s or 200 Ns?
400
If two objects start from rest with a spring between them, what is the momentum of the system once the spring is released?
What is zero?
500
What is the velocity of a 20 kg object moving with a momentum of 200 kg m/s?
What is 10 m/s?
500
A baseball bat exerts a force of 550 N imparting an impulse of 5.5 Ns, this is the time the baseball bat is in contact with the ball.
What is .01s?
500
Calculate the impulse needed to change a 1 kg cart from a velocity of 2 m/s to a velocity of 4 m/s
What is 2 Ns or 2 kg m/s?