Quiz about Chapter 2 Forces

Question 1

the SI unit for force

Accepted Answer

Newton

Answer

force

Answer

net force

Question 2

In _______________________, an object falling from the top of a building accelerates at 9.8 m/s squared.

Accepted Answer

free fall

Answer

satellite

Answer

Centripetal force

Answer

GPS

Question 3

A(n) ________________________ follows a curved path in space around Earth.

Accepted Answer

satellite

Answer

free fall

Answer

Centripetal force

Answer

GPS

Question 4

__________________________ causes an object to move in a circular path.

Accepted Answer

Centripetal force

Answer

satellite

Answer

free fall

Answer

GPS

Question 5

In which situation does the law of conservation of momentum apply?

Accepted Answer

in the absence of outside forces

Answer

in the absence of greatest velocity

Answer

in the presence of least velocity

Answer

in the presence of outside forces

Question 6

6) The state that exists when the only force acting on an object is gravity is called

Accepted Answer

free fall

Answer

inertia

Answer

acceleration

Answer

momentum

Question 7

Satellites in orbit around Earth travel in an almost circular path because Earth is

Accepted Answer

curved

Answer

centripetal

Answer

free falling

Answer

massive

Question 8

The acceleration due to gravity near the surface of Earth is equal to

Accepted Answer

9.8 m/s squared

Answer

9.8 m/s

Answer

9.8 kg x m/s

Answer

9.8 N

Question 9

The word centripetal means

Accepted Answer

center seeking

Answer

gravitational

Answer

continuous

Answer

free falling

Question 10

The force that causes an object to move in a circle is called __________________.

Accepted Answer

centripetal force

Answer

inertia

Answer

gravity

Answer

direction

Answer

Earth

Question 11

Any object that travels around another object in space is a(n) __________________.

Accepted Answer

satellite

Answer

inertia

Answer

centripetal force

Answer

gravity

Answer

Earth

Question 12

Together, satellites and ground receivers enable people using _______________ to pinpoint their geographic location.

Accepted Answer

GPS

Answer

satellite

Answer

free fall

Answer

Centripetal force

Question 13

What are the two factors that affect the frictional force between two surfaces? SELECT TWO ANSWERS!

Accepted Answer

types of surfaces

Accepted Answer

how are surfaces are pressed together

Answer

size of surfaces

Answer

how fast surfaces are moving

Question 14

______________________ is the centripetal force that causes a satellite to move in a circle.

Accepted Answer

gravity

Answer

inertia

Answer

direction

Answer

satellite

Answer

Earth

Question 15

If you could turn off a centripetal force, _______________________ would cause the object to fly off in a straight line.

Accepted Answer

inertia

Answer

direction

Answer

gravity

Answer

satellite

Answer

Earth

Question 16

Which of the following, moving at the same speed, would be hardest to stop?

Accepted Answer

fire engine

Answer

car

Answer

frisbee

Answer

stroller

Question 17

Which moving object, most likely, will have the greatest momentum?

Accepted Answer

volleyball hit by an Olympic volleyball player

Answer

volleyball hit by a fourth grader

Answer

volleyball hit by a senior adult (old person)

Answer

volleyball hit by a basketball coach

Question 18

Satellites in orbit around Earth continually fall toward _______________________.

Accepted Answer

Earth

Answer

inertia

Answer

direction

Answer

gravity

Answer

satellite

Question 19

Which formula is used to calculate momentum?

Accepted Answer

Momentum = Mass x Velocity

Answer

Momentum = Mass x Speed

Answer

Momentum = Volume x Velocity

Answer

Momentum = Weight x Speed

Question 20

Momentum, like velocity, is described by both a direction and a force.

Accepted Answer

false

Answer

true

Question 21

The total momentum of any group of objects remains the same unless outside forces act on the objects.

Accepted Answer

true

Answer

false

Question 22

The momentum of a 1000 kg vehicle traveling at a velocity of 25 m/s is 40 kg x m/s.

Accepted Answer

false

Answer

true

Question 23

An object traveling in a circle is accelerating because it is constantly changing ______________________.

Accepted Answer

direction

Answer

inertia

Answer

gravity

Answer

satellite

Answer

Earth

Question 24

If outside forces such as friciton are negligible, when two objects of the same mass collide and do not stick together, the objects multiply velocities.

Accepted Answer

false

Answer

true

Question 25

Newton's "quantity of motion" is conservation.

Accepted Answer

false

Answer

true

Question 26

The less momentum an object has, the easier it is to stop.

Accepted Answer

true

Answer

false

Question 27

What two factors affect the gravitational force between two objects?

Accepted Answer

mass and distance

Answer

mass and direction

Answer

weight and distance

Answer

weight and mass

Question 28

The ___________________________ states that the force of gravity acts between all objects in the universe that have mass.

Accepted Answer

Law of universal gravitation

Answer

law of inertia

Answer

Newton's 2nd Law

Answer

law of centripetal force

Question 29

As distance increases, gravitational force ___________________.

Accepted Answer

decreases

Answer

increases

Answer

stays the same

Question 30

When you stand on a bathroom scale, it displays the ______________________ that Earth is exerting on you.

Accepted Answer

gravitational force

Answer

friction force

Answer

centripetal force

Answer

ground force

Question 31

Friction acts in a direction _______________________ to the direction of the object's motion.

Accepted Answer

opposite

Answer

right

Answer

left

Answer

same

Question 32

The applied force required to push something across a surface ________________ as friction increases.

Accepted Answer

increases

Answer

decreases

Answer

stays the same

Answer

unknown

Question 33

If Manuel exerts a force of 10 N to push a desk to the right at the same time Lynn exerts a force of 10 N to push the desk to the left, the desk will move to the left.

Accepted Answer

false

Answer

true

Question 34

Planet A has a larger mass than Planet B. Both planets are the same distance from the sun and have a gravitational pull to it. Which planet experiences the greater pull from the sun?

Accepted Answer

Planet A

Answer

Planet B

Question 35

Planet C is 1000 kilometers away from the sun and Planet D is 750 kilometers away from the sun. Both planets have the same mass. Which has more gravitational pull to the sun?

Accepted Answer

Planet D

Answer

Planet C

Question 36

Forces are described by

Accepted Answer

strength and direction

Answer

strength and speed

Answer

velocity and direction

Question 37

sum of all forces acting on an object

Accepted Answer

net force

Answer

force

Answer

balanced forces

Answer

unbalanced forces

Question 38

push or pull

Accepted Answer

force

Answer

newton

Answer

balanced force

Answer

unbalanced force

Question 39

can change an object's motion

Accepted Answer

unbalanced forces

Answer

forces

Answer

balanced forces

Answer

net forces

Question 40

will not change an object's motion

Accepted Answer

balanced forces

Answer

forces

Answer

unbalanced forces

Answer

net forces

Question 41

Balanced forces do not change the motion of an object

Accepted Answer

True

Answer

False

Question 42

Forces cause some changes in motion.

Accepted Answer

false

Answer

true

Question 43

A net force causes no change in an objects motion.

Accepted Answer

false

Answer

true

Question 44

What is the correct equation for Newton's second law of motion?

Accepted Answer

Acceleration = Net force / Mass

Answer

Acceleration = Net force x Mass

Answer

Mass = Net force x Acceleration

Answer

Acceleration = Mass / Net force

Question 45

If you increase the force on an object, its acceleration increases.

Accepted Answer

True

Answer

False

Question 46

If you increase the mass of an object, its acceleration decreases.

Accepted Answer

False

Answer

True

Question 47

The amount of inertia an object has depends on its speed.

Accepted Answer

False

Answer

True

Question 48

Newton's first law of motion states that an object will not experience a change in motion unless acted upon by a(n) balanced force.

Accepted Answer

False

Answer

True

Question 49

To increase acceleration of an object, you reduce its mass or increase the applied force.

Accepted Answer

True

Answer

False

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