Energy and Forces

Which is an example of potential energy?

• a roller coaster speeding down a hill

• the pulled back string on an archers's bow

• releasing the strings on a guitar

• an electric current lighting a light bulb

Tags

NGSS.MS-PS3-2

The neighbor's cat ran through your yard. The cat has a mass of 1 kg. He is running at a speed of 2 m/s. What is the kinetic energy of the cat as he runs? KE=1/2 (m)(v^2)

• 4 J

• 3 J

• 1 J

• 2 J

Tags

NGSS.MS-PS3-1

A marble rolls down a hill. The marble has a mass of 1 kg and rolls at a rate of 2 m/s. What is the kinetic energy of the marble as it rolls?

• 4 J

• 16 J

• 2 J

• 0.5 J

Tags

NGSS.MS-PS3-1

Why is it harder to stop a four-person rowing team than a three-person rowing team?

• The four-person team has less mess and less kinetic energy.

• The four-person team has less mass and more kinetic energy.

• The four-person team has more mass and more kinetic energy.

• The four-person team has more mass and less kinetic energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Based on the information in the graph, we can predict that the kinetic energy of the object at 2 m/s would be ________.

• 12 J

• 20 J

• 38 J

• 44 J

Tags

NGSS.MS-PS3-1

Which scatter plot best shows the relationship between speed and kinetic energy?

• 
• 
• 
• 

Tags

NGSS.MS-PS3-1

A box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest.  Find the acceleration.

• 30 m/s

• 24 m/s²

• 9 m/s²

• 81 km/hr

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A roller coasters accelerates from an initial velocity of of 0 m/s to a final velocity of 20 m/s over 4 seconds. What's the acceleration?

• 4 m/s²

• 5 m/s²

• 6 m/s²

• 5 m/s

Tags

NGSS.MS-PS2-2

Which graph represents the greatest acceleration?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

Mrs. Cote wanted to know if the iPhone could stand up against being dropped from different heights. She dropped them from 3 heights and saw if they broke. What is the independent variable?

• Drop height

• If they had a case on them or not

• If they broke