Conceptual Physics-Las of Motion Unit-Newton's Law 3 and Energy Changes

Question 1

What is kinetic energy?

Answer 1

energy of movement; KE

Question 2

What is potential energy?

Answer 2

stored energy based on position; PE

Question 3

What is gravitational potential energy?

Answer 3

potential energy based on gravity; the higher /farther from Earth’s core, the more gravitational potential energy; PE (sub)g

Question 4

What is elastic potential energy?

Answer 4

potential energy based on stretching/compressing; PE (sub)e

Question 5

If one’s PE is 1000 at the top of a mountain, and your KE is 445 on the way up, what is your PE at the same time?

Answer 5

(1000-445=)

555

Question 6

If you started with 120 Joules of energy at the bottom of a hill and you use up all your KE to get to the top, what is your PE at the top?

Answer 6

120 Joules

Question 7

Can you destroy energy? OR Can you create energy without using energy?

Answer 7

NOOOOOOOOOOOO

Question 8

What is Newton’s third law of motion?

Answer 8

For every action/applied force there is an equal and opposite reaction/force

Question 9

Are action and reaction forces working on the same objects or different ones?

Answer 9

different ones

Question 10

Are actions and reactions equal or unequal?

Answer 10

equal

Question 11

How can something like a floor apply a reaction force?

Answer 11

When you walk (on a floor), you push backward and down on the floor. In order for you to move forward, the floor must be pushing you forward and up.

Question 12

IF you push against a wall with 200 newtons of force, how much force will the wall push back on you with?

Answer 12

It will apply 200 N of force

Question 13

Give an example in sports where action/reaction forces are at work and explain your example.

Answer 13

Must be situation in which two objects are pushing on each other WITH EQUAL FORCES in an action/reaction pair.