Conservation of Energy Calculation

A pendulum is swinging as shown. When the PE is 2 J, what is the KE? Ignore heat loss due to friction.

• 2 J

• 8 J

• 10 J

• 12 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A pendulum is given potential energy by being pulled up to location W. At which location does the pendulum have maximum kinetic energy?

• Location W

• Location X

• Location Y

• Location Z

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A rollercoaster goes down a hill. Which statement about a rollercoaster going down a hill is incorrect?

• the kinetic energy of the coaster increases

• the potential energy of the coaster increases

• the momentum of the coaster increases

• the speed of the coaster increases

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the principle of conservation of energy?

• Energy cannot be created or destroyed, only transformed.

• Energy can be created and destroyed.

• Energy is always increasing in a closed system.

• Energy is always decreasing in a closed system.

Tags

NGSS.MS-PS3-5

In a closed system, if the potential energy decreases, what happens to the kinetic energy?

• It increases by the same amount.

• It decreases by the same amount.

• It remains constant.

• It becomes zero.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Which of the following equations represents the conservation of mechanical energy?

Tags

NGSS.HS-PS3-2

A pendulum is released from a height. At the lowest point of its swing, what can be said about its energy?

• All potential energy is converted to kinetic energy.

• All kinetic energy is converted to potential energy.

• Energy is lost as heat.

• Energy is lost as sound.

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NGSS.MS-PS3-4

NGSS.MS-PS3-5

If a roller coaster car is at the top of a hill, what type of energy is at its maximum?

• Potential energy

• Kinetic energy

• Thermal energy

• Sound energy

• 490 J

• 50 J

• 98 J

• 500 J

Tags

NGSS.MS-PS3-2

In an isolated system, the total energy is 100 J. If 30 J of energy is converted to heat, what is the remaining mechanical energy?

• 70 J

• 30 J

• 100 J

• 0 J

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5