S8P3 Review

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.

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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

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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.

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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

Some pilots of hot-air balloons are getting ready to launch their balloons. Each pilot lights the flame to heat the air in her balloon. Then, the surrounding air applies a force to each balloon to lift it up. Each hot-air balloon has the same acceleration as it starts to rise. Based on the chart, order the colors from greatest to least to show the size of the force applied to each balloon.

• magenta, coral, turquoise, violet, cyan

• cyan, violet, turquoise, coral, magenta

• coral, cyan, magenta, turquoise, violet

• violet, turquoise, magenta, cyan, coral

Tags

NGSS.MS-PS2-2

A darts player is throwing new darts at a target to test them out. The player applies the same force to each dart as she is throwing it. Based on the chart, order the darts from least to greatest to show the size of the acceleration each dart will have as it is being thrown.

• blue, green, gold, red, silver

• silver, red, gold, green, blue

• silver, green, red, blue, gold

• gold, blue, red, green, silver

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NGSS.MS-PS2-2

The change of position over time is called

• position

• motion

• speed

• location

Speed in a specific direction is called

• speed

• acceleration

• position

• velocity

In a distance time graph, the steeper the line the...

• greater the speed

• slower the speed

• speed has reached zero

• speed has not changed

Tags

NGSS.MS-PS3-1