1.explain frame of reference. how is it different when you are riding inside a car or standing by the highway?
2. explain newton’s three laws of motion.
3. when riding in a car that suddenly stops, how is it different when you are wearing a seatbelt or not? explain how newton’s laws apply.
4. define force.
5. explain balanced and unbalanced force.
6. describe the four fundamental forces? arrange them from weakest to strongest.
7. what is work and power and their relationship?

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?