S8P3 Review

Carol tries to push a bookshelf across the room. As much as she tries, she can not get the bookshelf to move. Which statement best describes why the bookshelf is not moving?

• Carol did not apply enough force to the bookshelf and so the forces are unbalanced.

• Carol did not apply enough force to accelerate the bookshelf and so the forces are still balanced.

• Carol applied too much force to the bookshelf and now the forces on the bookshelf are balanced.

• Carol applied too much force to the bookshelf and now the forces on the bookshelf are unbalanced.

Tags

NGSS.MS-PS2-2

How is a space shuttle able to leave Earth's surface?

• The space shuttle's engines create an upward force greater than the downward force of gravity.

• The space shuttle's engines create a downward force greater than the upward force of gravity.

• The space shuttle's engines create an upward force less than the downward force of gravity.

• The space shuttle's engines create a downward force less than the upward force of gravity.

Tags

NGSS.HS-PS2-1

Katrina pushes off a flat sidewalk on her new skateboard. What causes her to move?

• The force of her push overcomes the forces of gravity and friction.

• The force of gravity overcomes the forces of her push and friction.

• The force of friction overcomes the normal force of the skateboard and the force of gravity.

• The normal force of the skateboard overcomes the force of her push and the force of gravity.

Tags

NGSS.MS-PS2-2

The picture shows two teams playing tug-of-war. If the force of each team is balanced by the other, then

• both teams will fall to the ground.

• both teams will move to the right.

• both teams will move to the left.

• both teams will remain in place.

Tags

NGSS.MS-PS2-2

The car is moving to the right. Which of the following explanation best describes the motion of the car?

• The speed of the car is increasing to the right because the rightward force is 1000 Newtons.

• The speed of the car is decreasing because the leftward force is greater than the rightward force.

• The car is moving to the left because the leftward force is greater than the rightward force.

• The car is at rest because the upward and downward forces are equal and opposite.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A ball is falling to the Earth. Which explanations best describes the behavior of the ball as it falls?

• The ball is floating because the forces acting on the ball are balanced.

• The ball is at rest because the forces acting on the ball are balanced.

• The ball is moving at a constant velocity (zero acceleration) because the forces acting on the ball are balanced.

• The ball is accelerating towards the Earth due the force of gravity.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which of the following are accelerating?

• an SUV that is cruising north at a steady speed

• a mini van that is parked in a driveway during a storm

• a mail truck that is slowing down as it approaches a mailbox

Tags

NGSS.MS-PS2-2

A motorcycle traveling at a constant speed is swerving to the right to avoid a pothole. Select the two correct answers that describe the motorcycle's motion.

• The motorcycle has constant velocity.

• The motorcycle has a changing velocity.

• The motorcycle is accelerating.

• The motorcycle has zero acceleration.

Tags

NGSS.MS-PS2-2

A piece of driftwood is floating straight down a stream at a constant speed. Select the two correct answers that describe the driftwood's motion.

• The driftwood has constant velocity.

• The driftwood has increasing velocity.

• The driftwood has decreasing velocity.

• The driftwood is accelerating.

• The driftwood has zero acceleration.

A sled is slowing down at the bottom of a snowy hill. Select the two correct answers that describe the sled's motion.

• The sled has constant velocity.

• The sled has increasing velocity.

• The sled has decreasing velocity.

• The sled is accelerating.

• The sled has zero acceleration.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5