Question 1

Clyde and Marilyn are riding a roller coaster. During which section(s) of the track is their potential energy converted to kinetic energy?

Accepted Answer

From point A to point B and from point C to point D

Answer

From point A to point B only

Answer

From point B to point C only

Answer

From point B to point D only

Question 2

Energy is defined as

Accepted Answer

The ability to do work

Answer

the ability to dissolve in water.

Answer

the mass of a substance times its acceleration.

Answer

how radioactive a substance is.

Question 3

Which of the following is the correction definition of mechanical energy?

Accepted Answer

energy an object has because of its motion or position.

Answer

energy resulting from the flow of charged particles, such as electrons or ions

Answer

energy stored in chemical bonds of molecules

Answer

energy of an object due to the random motion of its atoms and molecules

Question 4

A diagram of a roller-coaster track is shown below. Which circle  on the track shows the  roller-coaster car has the most gravitational potential energy.

Accepted Answer

the first circle from the left

Answer

the second circle from the left

Answer

the last circle

Answer

the third circle from the left

Question 5

Amy is at basketball practice. She is about to shoot a free throw.  When Amy releases the ball,

Accepted Answer

The ball will have kinetic energy and potential energy

Answer

the ball will not have kinetic energy but will have potential energy.

Answer

the ball will have kinetic energy but will not have potential energy.

Answer

the ball will have neither kinetic energy nor potential energy.

Question 6

Energy of motion is,

Accepted Answer

kinetic energy

Answer

potential

Question 7

The law of conservation of energy states that

Accepted Answer

energy cannot be created and it cannot be destroyed.

Answer

energy cannot be created and it cannot change form.

Answer

energy can be created and can be destroyed.

Answer

energy cannot change form and it cannot be destroyed.

Question 8

stored energy is

Accepted Answer

potential energy

Answer

kinetic energy

Question 9

A black squirrel is sitting on the ground. A red squirrel is sitting on a tree branch high above the black squirrel. Both squirrels have the same mass. Compared to the red squirrel, the black squirrel has _______ kinetic energy and ______ gravitation potential energy.

Accepted Answer

the same; less

Answer

less; more

Answer

more; less

Answer

the same; more

Question 10

A stone held above the ground has potential energy. when the stone is dropped, potential energy is converted to ________ energy.

Accepted Answer

kinetic

Answer

chemical

Answer

thermal

Answer

electrical

Question 11

Kevin goes bowling. Whenever he bowls the balls, he transfers energy from his hand to the bowling ball. The amount of energy before the transfer is _________ the amount of energy after the transfer.

Accepted Answer

equal to

Answer

not related to

Answer

less than

Answer

more than

Question 12

Mechanical energy is a term that is used to describe

Accepted Answer

both potential and kinetic energy.

Answer

neither potential nor kinetic energy.

Answer

kinetic energy only

Answer

potential energy only

Question 13

Kelly is sledding on a snowy hill in the winter. The energy the sled has as it slides down the hill is a form of

Accepted Answer

mechanical energy

Answer

chemical energy

Answer

electrical energy

Answer

potential energy

Question 14

If an object is moving, the amount of kinetic energy it has directly depends upon which of the following factors?

Accepted Answer

the object's mass and velocity

Answer

the object's height and velocity

Answer

the object's shape and mass

Answer

the object's density and velocity

Question 15

Can kinetic and potential energy transform to another type of energy?

Accepted Answer

yes

Answer

no

Question 16

Which of the following is an example of kinetic energy being converted to potential energy?

Accepted Answer

A bike rider stops pedaling and lets his bicycle coast up a hill.

Answer

At an ice rink, an ice skater gives another ice skater a gentle push.

Answer

the cord of a bow and arrow is released, propelling the arrow forward.

Answer

On a factory assembly line, boxes slide down a ramp.

Question 17

The Earth has a magnetic field around it, which is generated by its molten core. The magnetic field exerts a force on a compass dials, which are magnets, causing them to align with the Earth's magnetic field. This force on compass dials is an example of a force that

Accepted Answer

acts at a distance

Answer

needs electricity to act.

Answer

acts through particles in the air

Answer

acts only on contact

Question 18

Which of the following is true about magnetic poles?

Accepted Answer

Opposite poles attract each other, while like poles repel each other.

Answer

like pole attract each other, while opposite poles repel each other

Answer

all poles will attract

Question 19

Which of these events is caused by contact forces?

Accepted Answer

earthquakes along the San Andreas fault in California

Answer

picking up straight pins with a magnet

Answer

Jupiter's moons staying in orbit

Answer

high tides occurring on the East Coast

Question 20

A force of attraction would exist between

Accepted Answer

a positively charged object and a negatively charged objects

Answer

a negatively charged object and a neutral object

Answer

two negatively charged objects.

Answer

two positively charge objects.

Question 21

A negatively charged particle is attracted to

Accepted Answer

positively charged particles

Answer

all particles that are located close by

Answer

negatively charged particles.

Answer

only particles that are large

Question 22

The strength of a gravitational force between two objects depends on

Accepted Answer

mass and distance

Answer

size and shape

Answer

distance and volume

Answer

mass and volume

Question 23

Francine is dragging a heavy toolbox across a rough, cement floor. What contact force is she doing?

Accepted Answer

friction

Answer

static electricity

Answer

gravity

Answer

magnetism

Question 24

Which statement is true about gravitational force?

Accepted Answer

Every mass exerts a gravitational force on every other mass.

Answer

only moving masses exert a gravitational force on stationary masses.

Answer

only large masses exert a gravitational force on small masses.

Answer

only masses of equal size exert a gravitational force on each other.

Question 25

If two magnets were held in the position shown above, what would happen?

Accepted Answer

The magnets would repel each other

Answer

the magnets would neither repel nor attract each other

Answer

The magnets would simultaneously repel and attract each other

Answer

the magnets would attract each other.

Question 26

Some forces act at a distance and thus do not require _____.

Accepted Answer

contact

Answer

effort

Answer

energy

Answer

input

Question 27

Imagine an object falling to the Earth. Which of the following most accurately describes the motion of that object?

Accepted Answer

It falls toward the center of the Earth

Answer

it falls toward the nearest solid ground

Answer

it fall southward

Answer

its motion is random as it falls

Question 28

Which force is a noncontact force?

Accepted Answer

magnetic force

Answer

impact force

Answer

normal force

Answer

frictional force

Question 29

Katie rubs a balloon against her hair. Electrons from her hair travel to the balloon, giving the balloon a negative charge and her hair a positive charge. When the negatively charge balloon is brought near the strands of katie's hair, they  move to get closer to the balloon, without the balloon actually touching them. This shows that

Accepted Answer

Electric attraction is a force that can act at a distance

Answer

katie's hair would move in this way with or without the balloon.

Answer

electric attraction is a force that can only act on contact.

Answer

particles in the air must be pulling Katie's hair toward the balloon

Question 30

A crane is holding up a concrete block with a steel cable. What is a contact force that is acting on the block

Accepted Answer

tension

Answer

magnetism

Answer

gravity

Answer

static electricity

Question 31

Tyler kicks a soccer ball toward the opposite side of the field. If the ball moves at a constant speed, which graphs shows the position of the ball relative to Tyler through time?

Accepted Answer

z

Answer

w

Answer

x

Answer

y

Question 32

What is happening in the graph shown below?

Accepted Answer

The object moves away from the origin at a speed of 3 m/s, stands still 6 m away from the origin for 3 seconds, then moves toward the origin at a speed of 2 m/s/

Answer

The object moves away from the origin at a speed of 6 m/s, stands still 6 m away from the origin for 3 seconds, then moves toward the origin at a speed of 8 m/s.

Answer

the object moves toward the origin at a speed of 3 m/s, stands still 6 m away from the origin for 3 seconds, then moves away from the origin at a speed of 2 m/s

Answer

The object moves toward the origin at a speed of 6 m/s, stands still 6 m away from the origin for 3 seconds, then moves away from the origin at a speed of 8 m/s.

Question 33

Suppose a bicycle was coasting on a level surface, and there was no friction. What would happen to the bicycle's speed?

Accepted Answer

The speed would remain constant

Answer

The speed would increase since there is no friction

Answer

The speed would decrease until you finally came to a stop

Answer

The speed would decrease but you would never stop

Question 34

Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has a steep upward hill. Janice moves more slowly as she skates up the hill. Which graph show Janice's position as she roller skates away from her house?

Accepted Answer

x

Answer

z

Answer

w

Answer

y

Question 35

What is happening in the graph shown below?

Accepted Answer

The object is moving at a constant speed away from the origin.

Answer

The object is moving at a constant speed toward the origin.

Answer

The object is standing still

Answer

The object's speed is changing

Question 36

Which of the following statements is true of the above graph?

Accepted Answer

An object is standing still at a distance of 6 meters from the origin.

Answer

An object is moving at a constant speed of 6 m/s away from the origin.

Answer

An object is moving at a variable speed away from the origin.

Answer

An object is standing still on the origin.

Question 37

What is happening in the graph shown below?

Accepted Answer

The object is moving at a constant speed toward its point of origin

Answer

The object is moving at a constant speed away from its point of origin.

Answer

The object is standing still.

Answer

The object's speed is changing.

Question 38

Balanced forces will cause an object to move at a constant speed or to remain at rest. Which of the following graphs shows this situation?

Accepted Answer

y

Answer

x

Answer

z

Answer

w

Question 39

Which of the above objects is moving the fastest?

Accepted Answer

a

Answer

All 3 objects are moving at the same speed.

Answer

c

Answer

b

Question 40

______ can be generally defined as a change in position.

Accepted Answer

Motion

Answer

volume

Answer

force

Answer

mass

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