Speed, Velocity, Acceleration

Which of the following are accelerating?

• a comic book that is sliding across a coffee table with decreasing speed

• a heavy textbook that a student is lifting straight up at a constant speed

• a partially finished coloring book that a girl is waving in a circle

Tags

NGSS.MS-PS2-2

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

Volunteers are moving boxes at the food bank. The boxes are all the same size, but they contain different objects. The boxes have the same acceleration when the volunteers start to lift them. Based on the chart, order the boxes from greatest to least to show the size of the force applied to each box.

• apple, box of crackers, box of pasta, can of soup

• can of soup, box of pasta, box of crackers, apple

• box of pasta, can of soup, box of crackers, apple

• apple, box of crackers, can of soup, box of pasta

Tags

NGSS.MS-PS2-2

S8P3c ~ Identical train engines pull trains on different lines. The number of cars each engine pulls depends on the line. Each train has the same acceleration as it begins to move. Based on the chart, order the trains from least to greatest to show the size of the force applied to each train.

• commuter, holiday, midday, late night, weekend

• weekend, late night, midday, holiday, commuter

• holiday, commuter, weekend, midday, late night

• late night, midday, weekend, commuter, holiday

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Acrobats are being thrown by a catapult during a performance. The catapult applies the same force to each acrobat's feet. Based on the chart, order the acrobats from least to greatest to show the size of the acceleration the acrobats will have as they are being thrown.

• Vince, Mika, Troy, Olivia, David

• Troy, Mika, David, Vince, Olivia

• Olivia, Vince, David, Mika, Troy

• David, Olivia, Troy, Mika, Vince

Tags

NGSS.MS-PS2-2

A tugboat tows ships out of a harbor. The tugboat starts pulling the ships when they are stopped at a dock. The tugboat tows with the same force not matter the size of the ship. Based on the chart, order the ships from greatest to least to show the size of the acceleration each ship will have as it starts to move.

• Standard, Thunderer, Eden, Viceroy, Skipjack

• Skipjack, Viceroy, Eden, Thunderer, Standard

• Viceroy, Thunderer, Standard, Skipjack, Eden

• Eden, Skipjack, Standard, Thunderer, Viceroy

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

S8P3a ~ 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-PS2-2

Students are exploring the relationship between velocity and acceleration . This graph shows the acceleration of a remote-controlled toy car . Which statement is TRUE based on the graph?

• Segment BC and segment EF show constant speed .

• Segment OA and segment BC show constant speed .

• Segment AB and segment CD show positive acceleration .

•  Segment OA and segment DE show positive acceleration .

Tags

NGSS.MS-PS3-1

Which pair of statements is a valid description and explanation of the motion of the ball based on evidence from the diagram? (S8P3)

• description: The ball slows down as it moves to the right because the horizontal forces are unbalanced, with the larger force acting to the left . explanation: The ball speeds up as it moves downward because the vertical forces are unbalanced, with the larger force acting downward .

• description: The ball speeds up as it moves to the right because the horizontal forces are unbalanced, with the larger force acting to the right . explanation: The ball speeds up as it moves downward because the vertical forces are unbalanced, with the larger force acting downward .

• description: The ball moves at a constant speed to the right because the horizontal forces are unbalanced, with the larger force acting to the left . explanation: The ball slows down as it moves downward because the vertical forces are unbalanced, with the larger force acting upward .

• description: The ball slows down as it moves to the right because the horizontal forces are unbalanced, with the larger force acting to the right . explanation: The ball moves at a constant speed downward because the vertical forces are unbalanced, with the larger force acting upward .

Tags

NGSS.MS-PS2-2

A coach at a track meet measured the time of a runner every 10 meters (m) during a 100 m dash . The data for the runner are shown . Which statement is the BEST analysis of the data for the runner?

• The runner covers the first 80 m running at a constant speed and then slows down, reaching a

  minimum speed during the final 20 m .

• The runner starts slower and speeds up, reaching a constant speed between 20 and 80 m, and then

  speeds up again during the final 20 m .

• The runner covers the first 70 m running at a constant speed and then speeds up, reaching a maximum speed during the final 30 m .

• The runner starts slower and speeds up, reaching a maximum speed between 50 and 70 m, and then slows down during the final 30 m .

Tags

NGSS.MS-PS3-1