Energy, Force, Motion

This image displays the kinetic energy (KE), potential energy (PE), and total mechanical energy (TE) of a ball at three different positions as it slides down a stepped ramp. Which statement correctly describes the information displayed in the image?

• TE is conserved as KE is transformed into PE.

• TE is conserved as PE is transformed into KE.

• KE is conserved as TE is transformed into PE.

• PE is conserved as TE is transformed into KE.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The illustration shows the kinetic energy (KE) and potential energy (PE) of a cart as it moves on a model roller coaster at four points: A, B, C, and D. If there is no external work done on the system, what is the kinetic energy of the cart at Point C?

• 80

• 95

• 115

• 105

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The pendulum shown moves from point 1 to point 5. Which statement best describes the change in energy during motion of the pendulum?

• The kinetic energy at point 3 increases as it moves to point 4.

• The potential energy at point 2 increases as it moves to point 4.

• The kinetic energy at point 1 is equal to the potential energy at point 3.

• The potential energy at point 1 is equal to the potential energy at point 3.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A basketball bounces on the gym floor nine times and finally comes to a rest. Which of these best explains why the basketball rises to a lower height each time it bounces?

• Gravity increases as the basketball bounces.

• The floor adds energy to the bouncing basketball.

• Energy is transferred from the basketball to the floor.

• The air inside the basketball is heavier than the surrounding air.

Tags

NGSS.MS-PS3-5

A roller coaster car starts rolling from a rest at the top of a point V. Assuming there is no friction, between which two points will the roller coaster stop?

• V-W

• W-X

• X-Y

• Y-Z

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-2

John drove a truck for one hour at a rate of 80 kilometers per hour (km/hr). The next hour, he drove at 100 km/hr. What was his average speed during those two hours?

• 80 km/hr

• 90 km/hr

• 100 km/hr

• 85 km/hr

This graph shows the motion of a bus. If the bus continues moving at the same speed, what is the total distance that it will have traveled in 7.5 minutes?

• 15 km

• 20 km

• 25 km

• 30 km

Tags

NGSS.MS-PS3-1

The graph shows the motion of a student walking at different speeds. During which time interval does the student walk with a negative acceleration?

• 0–2 seconds

• 2–4 seconds

• 4–8 seconds

• 8–12 seconds

Tags

NGSS.MS-PS3-1

A change in the position of an object as time changes best describes

• direction

• waves

• motion

• frequency

Tags

NGSS.MS-PS2-2

What causes a free falling object to accelerate?

• inertia

• gravity

• initial speed

• initial direction

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4