motion

Question 1

distance

Answer 1

How far an object has moved

Question 2

displacement

Answer 2

the distance and direction of an object’s change in the position from the starting point

Question 3

speed

Answer 3

the distance an object travels per unit of time.

Question 4

average speed

Answer 4

the total distance traveled divided by the total time of travel

Question 5

instantaneous speed

Answer 5

the speed at a given point in time

Question 6

velocity

Answer 6

includes the speed of an object and the direction of its motion

Question 7

acceleration

Answer 7

the rate of change of velocity

Question 8

force

Answer 8

a push or pull

Question 9

net force

Answer 9

when two or more forces act on an object at the same time

Question 10

Balanced force

Answer 10

Forces on an object that are equal in size and opposite in direction

Question 11

inertia

Answer 11

the tendency of an object to resist any change in its motion

Question 12

newtons second law of motion

Answer 12

the acceleration of an object is I the same direction as the net force on the object, and that the acceleration equals the net force divided by the mass

Question 13

friction

Answer 13

forces that oppose the sliding motion between two touching surfaces

Question 14

static friction

Answer 14

force that prevents two surfaces from sliding past each other

Question 15

sliding friction

Answer 15

frictional force that opposes the motion of two surfaces sliding past each other

Question 16

air resistance

Answer 16

force that opposes the motion of objects that move through the air

Question 17

gravity

Answer 17

attractive force between two objects that depends on the masses of the objects and the distance between them

Question 18

weight

Answer 18

gravitational force exerted on an object

Question 19

centripetal acceleration

Answer 19

acceleration of an object toward the center of a curved or circular path

Question 20

centripetal force

Answer 20

a net force that is directed toward the center of a curved or circular path

Question 21

newtons third law of motion

Answer 21

for every action (force) in nature there is an equal and opposite reaction

Question 22

momentum

Answer 22

property of a moving object that equals its mass times its velocity