Answers FL-2002040-MJ Comprehensive Science 1 CRLab: Kinetic Energy

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Which is occurring when work is being done?

Energy is being reverted.

Energy is being decreased.

Energy is being increased.

Energy is being transferred.

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The table shows information about four students who are running around a track. Which statement is supported by the information in the chart?

Autumn has more kinetic energy than Chiang.

Mohammed has less kinetic energy than Autumn.

Lexy has more kinetic energy than Mohammed.

Chiang has less kinetic energy than Lexy.

Which set of terms best defines what affects kinetic energy and potential energy, respectively?

position, gravity

gravity, velocity

velocity, height

height, position

Which two types of potential energies would be types of mechanical energies?

electrical and kinetic

nuclear and chemical

radiant and thermal

elastic and gravitational

What is the unit of measure for energy?

watt

newtons

joules

meters per second

If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?

Total energy increases.

Stored energy decreases.

Energy of motion decreases.

Total energy decreases.

Seema knows the mass of a basketball. What other information is needed to find the ball’s potential energy?

the volume and height the ball reaches

the volume and shape of the ball

acceleration due to gravity and the height the ball reaches

acceleration due to gravity and the shape of the ball

When a spring is compressed, the energy changes from kinetic to potential. Which best describes what is causing this change?

work

power

gravitational energy

chemical energy

When Javier touches a hot mug of tea, energy is transferred from the surface of the mug to his hand. What kind of energy is this?

nuclear

radiant

thermal

chemical

This diagram shows a skier moving down a hill.

The skier has potential and kinetic energy.

The skier has only potential energy.

The skier has only kinetic energy.

The skier does not have potential or kinetic energy.

If Jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, what is being done?

compression

work

radiation

energy creation

The table shows information about four objects resting at the top of a hill. Which object is on the tallest hill?

Atoms contain subatomic particles called protons and neutrons. When these protons and neutrons split, a lot of energy is released.

nuclear

radiant

thermal

chemical

The amount of kinetic energy an object has depends on which feature of the object?

its motion

its position

its gravity

its height

What is the kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s? (Formula:)

25 J

5 J

50 J

100 J

The diagram shows a person holding a bow and arrow.

pulling farther back on the string

releasing the string

holding the arrow higher

decreasing the mass of the arrow

What is the energy of an object because of its potential and kinetic energies?

chemical energy

electrical energy

nuclear energy

mechanical energy

How does work affect energy between objects so it can cause a change in the form of energy?

Work transfers energy.

Work changes energy.

Work increases energy.

Work decreases energy.

A sled is at rest at the top of a slope 2 m high. The sled has a mass of 45 kg. What is the sled’s potential energy? (Formula: PE = mgh)

90 J

56.8 J

441 J

882 J

An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? (Formula: )

7.5 kg

15 kg

60 kg

120 kg

What kind of energy involves the flow of charged particles?

thermal

radiant

electrical

nuclear

Let's consider a scenario of a roller coaster ride. As the roller coaster at the top begins to descend, it loses height, which means its potential energy decreases and kinetic energy starts increasing and reaches its maximum value.By using the above scenario, which statement best compares potential and kinetic energy?

Objects always have more potential energy than kinetic energy.

Kinetic energy increases and potential energy decreases when the velocity of an object increases.

Only potential energy decreases when an object’s height increases.

Objects always have more kinetic energy than potential energy.

This diagram shows a baseball’s motion.

Kinetic energy becomes potential energy between points R and S.

Maximum potential energy is at point P.

Maximum potential energy is at point R.

Potential energy becomes kinetic energy between points P and Q.

Ella has a mass of 56 kg, and Tyrone has a mass of 68 kg. Ella is standing at the top of a skateboard ramp that is 1.5 meters tall. Which conclusion is best supported by the given information?

If Tyrone stands at the top of the same ramp, his potential energy will be less than Ella’s.

If Tyrone stands at the top of a 1 m high ramp, his potential energy will be greater than Ella’s.

If Tyrone stands at the top of the same ramp, his potential energy will be the same as Ella’s.

If Tyrone stands at the top of a 2 m high ramp, his potential energy will be greater than Ella’s.

Shondra takes notes in class.

Switch "the energy of moving objects" and "the ability to do work" and place chemical energy under "Forms of energy."

Switch "the energy of flowing electrical charges" and "the energy in a spring" and place kinetic energy under "Forms of energy."

Switch "the energy in the nuclei of atoms" and "the energy stored in objects'" and place nuclear energy under "Main categories of energy."

Switch "the energy from the Sun" and "the energy of a rock on a hill" and place electrical energy under "Main categories of energy."

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