1D Motion
2D Motion
Force
Energy/Momentum
Torque/Rotation
100

Define the variables X, V, a, and t

Position, velocity, acceleration, and time

100

Which velocity is constant in a projectile motion problem?

Vx

100

If I took a dumbbell to the moon:

Its mass: Increases, decreases, or stays the same?

Its weight: Increases, decreases, or stays the same?

Mass will stay the same

Weight will decreases (things are "lighter" on the moon)

100

What energy does a cannonball have when it's shot in the air? (more than one)

Kinetic and gravitational potential energy

100

How do you convert an angle from degrees to radians? How do you convert an angle from radians to degrees?

degrees-->radians, multiply by 2π/360°

radians-->degrees, multiply by 360°/2π

200

An object is speeding up when velocity and acceleration are both _________

the same sign

200

Which trig function will help you find the value of the side "x"? (I will draw it on the board)

I don't know!!

200

Would a 5kg block being pushed along a road experience more, less, or the same amount of friction as a 10kg block being pushed along the same road?

The 5kg block would experience less friction than the 10kg block. Consider the equation Ff=μkN, where the 10kg block would have a greater value for N.

200

What happens when two cars collide in an elastic collision? What if it was inelastic?

In an elastic collision the cars bounce off each other.

In an inelastic collision they stick together.

200

I'm having trouble unscrewing a stuck bolt with a wrench. What are three physics-related factors I need to consider to help unscrew it?

1) A strong force

2) A 90 degree force angle

3) Applying the force as far from the bolt as possible

300
On the moon, would the free fall acceleration be greater or less than ours on Earth, "g". Why?
Less. Things fall slower on the moon; thus, they "accelerate" with a smaller gravitational acceleration
300

For a standard projectile motion problem, does ax stay the same or does it vary? What about ay?

ax=0

ay=-9.8m/s2

300

True or False: on a flat, non-inclined surface, an object's normal force is always equal to "mg"

False. The normal force from a surface is just whatever forces are pushing down on it, which can be greater or less than "mg". N would only be equal to mg when there are no other vertical forces acting on it.

300

When a problem asks "how much does the object compress the spring?" what energy will always be zero at that EF position?

Kinetic energy is zero when a spring is fully compressed

300

What are two cases where putting a force on a rotating beam would cause it to NOT rotate

1) putting a force on the pivot

2) Putting a force parallel to the beam (θ=0°)

400

When a car crashes into another car, what two values or variables are equal?

The positions of both cars are equal. This also occurs the moment two objects pass each other.

400

When asked to find the maximum height of an object in projectile motion, what variable value do we already know at that moment, without solving? 

VY=0 at the top of an objects trajectory.

400

For a block on a slope inclined at angle θ, what is the component of the weight force that is perpendicular to the slope?

mgcos(θ)

400

How do you know when to use conservation of momentum, as opposed to conservation of energy in a problem?

You would use conservation of momentum when a crash or collision occurs.

400

Write Newton's seconds law (F=ma, or a=F/m) using the rotational equivalent variables,

(like how x=θ, v=ω, etc.)

τ=Iα 

(torque = moment of inertia times angular acceleration)

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