Chapter 11 21-22

Question 1

Distance

Answer 1

length between 2 places

Question 2

Position

Answer 2

location compared to other things

Question 3

motion

Answer 3

change in an objects position compared to a fixed object

Question 4

speed

Answer 4

how fast an objects position changes over time

Question 5

velocity

Answer 5

description of a moving objects speed and direction

Question 6

acceleration

Answer 6

a change in the velocity of an object over time

Question 7

force

Answer 7

any push or pull on an object

Question 8

friction

Answer 8

force that opposes the motion of an object

Question 9

Newtons First Law Of Motion

Answer 9

an object at rest tends to stay at rest and an object in motion tends to stay in motion

Question 10

work

Answer 10

necessary force to move an object through a distance

Question 11

energy

Answer 11

ability to do work

Question 12

potential energy

Answer 12

energy stored in an object or material

Question 13

kinetic energy

Answer 13

energy of motion

Question 14

thermal energy

Answer 14

heat energy in an object

Question 15

law of conservation of energy

Answer 15

energy changes from one form to another but cannot be created or destroyed

Question 16

power

Answer 16

work divided by time

Question 17

simple machine

Answer 17

machine with few if any moving parts

Question 18

mechanical advantage

Answer 18

amount of times simple machines multiply advantage force

Question 19

lever

Answer 19

consists of rigid bar and pivot point

Question 20

fulcrum

Answer 20

pivot point

Question 21

wheel and axle

Answer 21

first class lever that has a wheel and a small axle

Question 22

pulley

Answer 22

grooved wheel that turns by the action of a rope

Question 23

inclined plane

Answer 23

straight slanted surface

Question 24

screw

Answer 24

inclined plane wrapped around a bar

Question 25

wedge

Answer 25

inclined plane that changes the direction of applied force