Force and Motion

Force and Motion

Test Review!

Multiple Choice

What is a force that opposes motion?

• Direction

• Friction

• Potential energy

• Kinetic Energy

Multiple Choice

What causes a change in motion?

• Force

• Position

• Potential energy

• Kinetic energy

Fill in the Blank

Describe force, mass, and motion by comparing the two pictures.

Multiple Choice

What is described by an object’s direction and speed?

• Friction

• Force

• Motion

• Potential energy

Multiple Choice

Which statements correctly differentiate mechanical energy from thermal energy?

• Mechanical energy is determined by the gravitational pull of Earth while thermal energy is determined by the centripetal force of Earth.

• Mechanical energy is due to the motion of an object while thermal energy is due to the collision of molecules.

• Mechanical energy is measured at the system level while thermal energy is measured at the molecular level.

• Mechanical energy is independent of the weight of the moving body while thermal energy is dependent on the weight of the moving body.

Multiple Choice

Energy of motion is known as —

• light energy

• elastic potential energy

• kinetic energy

• gravitational potential energy

Multiple Choice

Students described the amount of force needed to change the motion for each ball from idle to rolling. Which statement is true?

• The bowling ball has less mass, but it took more force to make it roll.

• The bowling ball has more mass, therefore it took more force to make it roll.

• The beach ball has less mass, but it took more force to make it roll.

• The beach ball has more mass, therefore it took less force to make it roll.

Multiple Choice

Which energy is used to place a car in motion?

• Chemical energy stored in the wheels

• Mechanical energy stored in the fuel

• Chemical energy stored in the fuel

• Mechanical energy stored in the wheels

Multiple Select

Which statements are correct about the conversion of energy of the marble?

• Potential energy changes to kinetic energy from A to B.

• Kinetic energy changes to potential energy from B to C.

• Kinetic energy changes to potential energy from C to D.

• Potential energy changes to kinetic energy from C to D.

Multiple Choice

When an electric motor is plugged in and the switch is turned on, the coils in the motor rotate fast. Over time the body of the electric motor becomes warm. Which energy conversion is correct for an electric motor?

• Electrical energy → Motion energy + Heat energy

• Electrical energy → Heat energy

• Electrical energy → Motion energy

• Electrical energy → Heat energy + Light energy

Multiple Choice

The force that holds the planets in orbit around the sun is called—

• gravity

• motion

• friction

• pressure

Multiple Choice

What kind of energy does an apple hanging on a tree limb have?

• motion

• potential

• kinetic

• friction

Multiple Choice

Animals obtain energy from the food they eat and store it in their muscles. To what is this energy converted?

• food

• light

• heat

• motion

Multiple Choice

A child is riding her bike on a straight path as shown in the image.

A friend applies a force on the bike as shown in the second picture. How will the motion of the bike change?

• It will go slower with more force

• It will go faster with less force

• It will go faster in the opposite direction

Multiple Choice

What is energy?

• a product of force and distance

• the ability to stand still

• the ability to do work

• anything that has mass

Multiple Choice

Four toy cars were pushed on a surface with the same force. They traveled a distance before coming to a stop. The graph shows the distance and time plotted for the motion of the four toy cars.

• toy car 2 traveled faster than toy car 1

• toy car 1 traveled fastest

• toy car 3 traveled faster than toy car 4

• Toy car 2 traveled faster than toy car 3

• toy car 3 traveled the fastest

Multiple Choice

Speed is the measure of...

• force

• solid

• science

• motion