The three vehicles shown below are all traveling at a speed of 15 m/s, but only the pickup truck has a changing velocity. The pickup truck has a changing velocity because the pickup truck —

• can accelerate faster than the other two vehicles
• can accelerate faster than the other two vehicles
• is traveling on a curve in the road
• needs a large amount of force to move

Tags

NGSS.HS-PS2-1

Which of the following situations shows work being done?

• A student is sitting in a chair and holding both boxes.
• A student is holding the large box 1 m above the floor.
• A student is standing and holding the small box.
• A student is lifting the small box 0.5 m from the floor to a table

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

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• F The speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp.
• The speed of the cart increases as the cart rolls down the ramp because the force acting on the cart is greater than the force of gravity
• The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.
• The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply brakes at the same time to stop?

• The car with the smaller mass will require less force to stop than the car with the larger mass.
• The car with the larger mass will maintain its velocity while traveling down the hill.
• The car with the smaller mass will take longer to stop than the car with the larger mass
• The car with the larger mass will have less inertia than the car with the smaller mass

Tags

NGSS.MS-PS2-2

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• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS2-2

An object will continue moving in a straight line unless it is acted on by an unbalanced force. Which of the following best explains Earth’s motion?

• There is no unbalanced force acting on Earth because space is empty and nothing touches Earth.
• The gravitational force pulling Earth toward the sun is equal and opposite to the force pulling the sun toward Earth, so there is no unbalanced force acting on Earth.
• The sun moves in an elliptical orbit around Earth, and the sun’s gravity pulls Earth along.
• Earth moves in an elliptical orbit around the sun because the gravitational force of the sun attracts Earth.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

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• 13N
• 7N
• 8N
• 12N

Tags

NGSS.MS-PS2-2

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• the mass of a the plates
• the weight of the plates
• unbalanced force
• gravitational force

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS3-2

What is the net force on the block? (click on the words to view the picture)

• 5 Newtons up
• 5 Newtons down
• 15 Newtons up
• 15 Newtons down

Tags

NGSS.MS-PS2-2

Find the average speed of a train that traveled 540 km in 6 hours?

• 80 km/h
• 100 km/h
• 90 kn/h
• 3240 km/h

Tags

NGSS.MS-PS3-1