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AP Physics 1: 1.1 Changes and Conservation Laws. What is the speed of the other piece of wood?

AP Physics 1: 1.3 Changes and Conservation Laws. How fast is the particle falling at the instant before it hits the ground?

AP Physics 1: 1.5 Changes and Conservation Laws. Which of the following can be classified as elastic collisions?

We've heard of some crazy dieting fads, but leaving the planet may take the cake. We don't suggest you do that, but we do suggest you answer t...

Don't let this question about gravitational forces get you down! Yeah, yeah...that was an easy joke. You get what you pay for. 

THE EARTH'S MASS IS ABOUT TO DOUBLE. Sorry for the extreme tone; we just want to make sure you understand the...gravity of the situation.

If there's one good thing about the heat death of the universe, it's that we'll all have an excellent excuse for dodging physics homework.

The real moral of the story here is just "don't get in the way of elephants or tigers." That is not the kind of kinetic energy you want to absorb.

We're not going to force you to answer this question about forces, but we suggest you gravitate towards it anyway. 

AP Physics 1: 1.5 Properties of Objects and Systems. Which of the following can be classified as a system?

This video has not been endorsed by cats. Seriously, don't build a teleporter just to send a cat into space. 

It's not the electron's fault it keeps bringing a bunch of negative energy to the room.

We wouldn't give away the answer to this AP Physics question, not for all the joules in the crown. Come back when you've got some actual jewels. Th...

AP Physics 1: 1.2 System Interactions and Changes. What is the total mechanical energy of the system?

AP Physics 1: 1.5 System Interactions and Changes. How much energy is expended in one lap?

AP Physics 1: 1.3 Waves. Find the wave speed.

AP Physics 1: 2.5 Waves. Which other quantities need to be measured?

AP Physics 1: 1.5 Waves. What can possibly occur when the two waves reach each other?