Grade 8 Mechanical Energy

Determine the POTENTIAL energy of the cart at position "B"

Tags

NGSS.MS-PS3-2

Determine the POTENTIAL energy of the cart at position "C"

Tags

NGSS.MS-PS3-2

In reality, as the roller coaster moves along the track, some energy would be "lost". Where does the "lost" energy go? **CHOOSE TWO (2)**

• It disappears completely and never comes back

• It is transformed into thermal energy by friction

• It is transformed into sound energy

• It turns into matter

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

This graph relates speed and time of four cars (1, 2, 3, 4) traveling along a straight highway. Which two cars move with zero acceleration?

• 1 and 4

• 2 and 3

• 1 and 2

• 3 and 4

Tags

NGSS.MS-PS3-1

A Physical Science student wants to measure the speed of a toy car at the bottom of a hill. Which information is needed to calculate speed?

• The mass of the car and the height of the hill

• The friction of the surface of the hill and the mass of the car

• the length of the hill and the time for the car to go down the hill

• the length of the car and the time for the car to go down the hill

Tags

NGSS.MS-PS3-1

Which of Newton's laws best describes inertia?

• 1

• 2

• 3

• All of the above

The diagram below shows a model airplane. Which energy transformation occurs in a rubber band powered model airplane when it is flown?

• Thermal energy stored in the rubber band is transformed into chemical energy used by the propeller.

• Kinetic energy stored in the rubber band is transformed into thermal energy used by the propeller.

• Chemical energy stored in the rubber band is transformed into potential energy used by the propeller.

• Potential energy stored in the rubber band is transformed into mechanical energy used by the propeller.

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NGSS.MS-PS3-4

NGSS.MS-PS3-5

Kinetic energy is the energy of

• stored energy

• motion

• elastic

• gravity

Tags

NGSS.MS-PS3-1

• 20 Joules

• 40 Joules

• 30 Joules

• 1.2 Joules

Tags

NGSS.MS-PS3-1

It is the energy of a moving object.

• Potential Energy

• Chemical Energy

• Elastic Energy

• Kinetic Energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5