Forces and Motion

Brian and Emily are testing different paper airplane designs. Emily's plane travels about fifty feet and then falls to the ground. Why does the plane eventually fall?

• The force of air resistance stops acting on the plane.

• The plane was not designed to carry a load like a paperclip.

• The force of gravity is greater than the forces keeping the plane in the air.

• The paperclip creates a magnetic force that attracts the plane to the ground.

Tags

NGSS.MS-PS2-2

Julio and Tammy are moving a dresser. Julio pushes with a force of 5 Newtons towards Tammy, and Tammy pushes with a force of 10 Newtons towards Julio. What happens to the dresser?

• The dresser does not move.

• The dresser moves towards Julio.

• The dresser moves towards Tammy.

• The dresser moves towards Tammy, then back towards Julio.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Marcie rides in her mother's car and her father's car to school. It takes less time in her mother's car. Which statement is true?

• Her mother's car is traveling at a greater speed than her father's car.

• Her father's car is traveling at a greater speed than her mother's car.

• Both cars are traveling at the same speed since they travel the same distance.

• Both cars accelerate at the same rate, but her mother's car has a greater mass.

Magnets have a north and south pole. What happens if you try to touch the north and south ends of two magnets together?

• The north and south poles will repel each other.

• The north and south poles will be attracted to each other.

• The north and south poles will neither attract nor repel each other.

• The north and south poles will create gravity and attract other objects.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Look at the picture of the water fountain. Which statement about the picture best describes the effect of gravity?

• On a hot day, the grass around the fountain becomes very warm.

• The water moves into the air.

• The sun warms the water in the fountain.

• The water that moves into the air falls back to the fountain.

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS2-5

Tameika's mom parked their car on the road. Tameika ran from the car to the house. Which statement is true about Tameika’s movement?

• Tameika changed direction but did not change position.

• Tameika's speed was the same throughout the movement.

• Tameika changed position and may have changed direction.

• Tameika's position was the same throughout the movement.

Tags

NGSS.3-PS2-1

Noah is playing with a soccer ball at the top of a hill. Noah kicks the ball and it rolls down the hill. Which of the following best describes what happens as the ball rolls?

• The force of gravity pulls the ball downhill.

• The force of friction causes the ball to roll faster down the hill.

• The force of gravity is balanced by air resistance acting on the ball.

• The force of friction is greater than the force of gravity acting on the ball.

Tags

NGSS.MS-PS2-2

Ruben slides a book across the floor. Eventually, the book will stop moving. What force causes the book to come to rest?

• gravity

• friction

• Ruben's push

• air resistance

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Mrs. Seaver has a poster of the solar system hanging in her classroom. Why is the poster not falling to the ground?

• There are no forces acting on the poster.

• The forces acting on the poster are balanced.

• The forces acting on the poster are unbalanced.

• The force of gravity is stronger than the force of friction.

Tags

NGSS.MS-PS2-4

Garrett balanced his straw on the top of his drinking glass. Which of the following is true?

• The straw must be magnetically attracted to the glass.

• The straw must fall off the glass eventually, due to gravity.

• If the straw falls off the glass, this means another force was applied.

• If no outside force is applied to the straw or glass, then the straw will fall down.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4