Energy Presentation

Multiple Choice

Each sentence describes the effect of a force.

1. A baseball thrown into the air comes back down again.

2. A volleyball player spikes a ball over the net.

3. Water pushing against a swimmer as they move through the water.

4. A tennis ball comes up from the ground after it is bounced.

5. The needle in a compass points toward the North Pole.

Which correctly pairs each effect with the force that causes it?

• 1: Magnetism; 2: Normal; 3: Gravity; 4: Friction; 5: Applied

• 1: Gravity; 2: Applied; 3: Friction; 4: Normal; 5: Magnetism

• 1: Applied; 2: Friction; 3: Normal; 4: Magnetism; 5: Gravity

• 1: Friction; 2: Magnetism; 3: Applied; 4: Gravity; 5: Normal

Multiple Choice

A worker pushes a large box across the smooth floor of a warehouse. Four forces, labeled A through D, are shown in the diagram.

Which correctly identifies the forces shown?

• Force A: Applied; Force B: Friction; Force C: Gravity; Force D: Normal

• Force A: Friction; Force B: Gravity; Force C: Normal; Force D: Applied

• Force A: Applied; Force B: Normal; Force C: Gravity; Force D: Normal

• Force A: Normal; Force B: Friction; Force C: Applied; Force D: Gravity

Multiple Select

Choose the answers that describe the changes to the scenario that would affect Forces B and C. Select 3 that apply

• Objects are added to the box to make it much heavier

• The worker is replaced with someone stronger.

• The worker pushes the box over an uneven or rough floor

• Objects are removed from the box to make it much lighter

Multiple Choice

Magnetism is a force that can be either a push or pull. Magnetic force is exerted when a magnet interacts with or with another magnet. In the diagram, two bar magnets are placed near each other with the north pole of one facing the south pole of the other. Since the magnets are placed with their north and south ends near each other, the magnetic force between them will be_______________________.

Which terms best complete the paragraph?

• noncontact; any object; repulsive

• noncontact; metal; attractive

• contact; any object; attractive

• contact; metal; repulsive

Multiple Select

Choose the 3 change(s) that can affect the strength or direction of the magnetic force between the magnets in the diagram. Select 3 correct answers.

• Orientation of magnets

• Strength of magnets

• Distance between magnets

• Mass of the magnets

Multiple Select

Identify the true statement(s) about the force that occurs between our planet and the moon that keeps the moon in orbit. Select 2 that apply.

• Gravity is an attractive-only force that pulls objects towards other objects.

• Magnetism between Earth and the moon is possible due to the composition of metals within Earth’s core.

• Friction is a contact or non-contact force that increases in strength as distance decreases.

• The greater the mass of an object, the greater the force of its gravity on other objects.

Multiple Choice

According to NASA, our moon moves approximately one inch away from Earth each year. If this pattern continues, how could the increased distance affect the strength of the force between Earth and the moon?

• As distance increases, the strength of the force would increase.

• As distance increases, the strength of the force would weaken

• The strength of the force would increase and decrease due to other factors.

• The strength of the force would not change, because it is not dependent on distance

Multiple Choice

As swimmers propel themselves through water, there are a variety of forces at work.

Which forces are acting on the swimmer in the diagram at A and B? Select all that apply.

• Force A is the frictional force known as water resistance that pulls the swimmer backward.

• Force A is the applied force the swimmer uses to propel themselves through the water

• Force B is the normal force that is equal to and cancels out the force of gravity pulling the swimmer.

• Force B is the gravitational force pulling the swimmer towards the Earth’s surface

Multiple Choice

A student in gym class wants to climb the rope attached to the ceiling. They pull with a force of 80 N but do not move off the ground.

What is the net force exerted on the student?

• 0 N

• 40 N

• 80 N

• 160 N

Multiple Choice

A student in gym class wants to climb the rope attached to the ceiling. They pull with a force of 80 N but do not move off the ground

Determine whether the forces acting on the student and rope are balanced or unbalanced

• The forces are unbalanced because the net forces equal zero

• The forces are balanced because the net forces do not equal zero.

• The forces are balanced because the net forces equal zero.

• The forces are unbalanced because the net forces do not equal zero.

Multiple Choice

Which factors affect the amount of kinetic energy an object has?

• Mass and speed

• Color and shape

• Temperature and texture

• Height and volume

Multiple Choice

According to the Law of Conservation of Energy, energy cannot be _________ or ____________. 

• destroyed, destroyed
• created, saved
• created, destroyed
• lost, found

Multiple Choice

Which term means the ability to cause change in matter?

• Kinetic energy

• energy

• potential energy

• electrical energy

Multiple Choice

Which factor increases the gravitational potential energy of an object?

• Its color

• Its temperature

• Its height above the ground

• Its speed

Multiple Choice

Explain what happens to the potential energy of a rock as it falls off the side of a cliff.

• The kinetic energy decreases as the potential energy increases.
• The kinetic energy decreases as the potential energy decreases.
• The potential energy decreases as the kinetic energy increases.
• The potential energy decreases as the kinetic energy decreases. 

Multiple Select

Select all the factors that determine the amount of gravitational potential energy an object has.

• Mass

• Height above Earth's surface

• Color

• Shape

Multiple Choice

Which of the following statements about kinetic energy is correct?

• Kinetic energy increases with mass and velocity.

• Kinetic energy decreases with mass and velocity.

• Kinetic energy is not affected by mass.

• Kinetic energy only depends on velocity.

Multiple Choice

Which of the following statements is true about kinetic energy?

• It is stored in objects at rest.

• It represents motion and the ability to cause change.

• It cannot be converted to other forms of energy.

• It is only present in living things.