Newton's Laws of Motion Test

Question 1

contact force

Answer 1

arise from physical contact

Question 2

Action-at-a-distance force (field force)

Answer 2

do not require contact and include gravity and electrical forces

Question 3

Mass

Answer 3

the measure of inertia in an object

Question 4

Mass is a (vector/scalar?)

Answer 4

scalar

Question 5

Force is a (vector/scalar?)

Answer 5

vector

Question 6

Newton’s First Law of Motion

Answer 6

an object at rest stays at rest, and an object in motion stays in motion

Question 7

net force

Answer 7

the vector sum of all of the forces action on an object

Question 8

inertia

Answer 8

the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line

Question 9

Newton’s Second Law of Motion

Answer 9

Net force= m x a

Question 10

In a velocity time graph, how do you find the acceleration and displacement?

Answer 10

To find acceleration, find the slope
To find displacement, find the area under the graph

Question 11

Mass _ change when in a different location

Answer 11

doesn’t change

Question 12

Weight _ change when in a different location

Answer 12

does

Question 13

weight

Answer 13

force exerted on an object by gravity

Question 14

How do you calculate weight?

Answer 14

W= m x g

Question 15

The Normal Force

Answer 15

a force exerted perpendicular to a surface

Question 16

Newton’s third law of motion

Answer 16

for every action, there is an equal but opposite reaction

Question 17

Friction

Answer 17

a resistive force that opposes the motion of an object (Ff)

Question 18

Kinetic Friction

Answer 18

Friction in motion

Question 19

How do you find kinetic friction?

Answer 19

Ff= mu (Fn)

Question 20

The normal force is equal to _ on flat surfaces

Answer 20

weight

Question 21

The larger the coefficient of kinetic friction the _ the force

Answer 21

greater

Question 22

Static Friction Force

Answer 22

the frictional force between two surfaces that are not moving along each other

Question 23

What is the equation for static friction force?

Answer 23

Ffr is less than or equal to mu x Fn

Question 24

Tension Force

Answer 24

a pulling force

Question 25

How do you find the tension force?

Answer 25

Ft= mg

Question 26

Explain the inclined plane

Answer 26

• Fn is always perpendicular
• Mg is always downward
• X and Y axes are rotated to line up with surface of the plane

Question 27

What is the x component for the inclined plane?

Answer 27

Fx= mg (sin theta)

Question 28

What is the y component for the inclined plane?

Answer 28

Fy= mg (cos theta)

Question 29

When there is no friction on an inclined plane how do you find the acceleration?

Answer 29

ax= g (sin theta)

Question 30

When there is no friction on an inclined plane how do you find the normal force?

Answer 30

Fn= mg (cos theta)

Question 31

On an inclined plane, the normal force is equal to

Answer 31

the y component

Question 32

When there is friction on an inclined plane how do you find the acceleration?

Answer 32

ax= g (sin theta - mu cos theta)

Question 33

When there is friction on an inclined plane how do you find the normal force?

Answer 33

Fn= ma (cos theta)

Question 34

How do you find the normal force when pushing/ pulling something (not at an angle)

Answer 34

0= Fn + m(g)

Question 35

How do you find the acceleration when pushing/ pulling something (not at an angle)

Answer 35

m (a)= Fapp- (mu) (Fn)

Question 36

How do you find the normal force when pushing/pulling something at an angle?

Answer 36

0= Fn + Fapp y + m (g)
- push= - pull= +