Apologia Physical Science Module 8

The force exerted by a machine

• Energy

• Potential energy

• Output force

• Input force

The distance the output force is exerted through, or how far the load moves

• Output force
• Input force
• Input distance
• Output distance

The distance the input force is applied

• Output force
• Input force
• Input distance
• Output distance

The ability to do work

• Input distance
• Energy
• Potential energy
• Kinetic energy

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-2

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Energy that is stored as a result of position or shape

• Kinetic energy
• Potential energy
• Energy
• Input force

Tags

NGSS.MS-PS3-2

The force a person exerts on a machine

• Output distance
• Output force
• Input distance
• Input force

The energy of an object due to its motion

• Kinetic energy
• Potential energy
• Energy
• Input force

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

If the speed of an object doubles, what happens to its kinetic energy.

• KE doubles

• KE stays the same

• KE is halved

• KE quadruples

Answer explanation

KE is directly proportional to the square of the speed. So if speed doubles, KE will quadruple (22 = 4).

Tags

NGSS.MS-PS3-1

Which of the following is an example of an object with elastic potential energy?

• a stretched spring

• books on a shelf

• a moving arrow

• a falling oyster

Answer explanation

Objects, like the stretched spring, that can stretch or compress and then return to their original shape have elastic potential energy.

Tags

NGSS.MS-PS3-2

Which of the following is an example of electromagnetic energy?

• a speeding car

• sunlight

• a falling stone

• a stretched bowstring

Answer explanation

Sunlight is an example of electromagnetic energy which is energy carried in waves through space.

Tags

NGSS.MS-PS4-2