Speed, Velocity, Acceleration

Which of the following are accelerating?

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

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

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

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

S8P3a ~ 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.

S8P3a ~ 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.

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-PS3-1

NGSS.MS-PS3-5

S8P3a ~ An antelope is running faster and faster away from a hungry lion. Select the two correct answers that describe the antelope's motion.

• The antelope has constant velocity.

• The antelope has increasing velocity.

• The antelope has decreasing velocity.

• The antelope is accelerating.

• The antelope has zero acceleration.

S8P3a ~ A golf ball is sitting still on the grass three feet from the hole. Select the two correct answers that describe the golf ball's motion.

• The golf ball has constant velocity.

• The golf ball has increasing velocity.

• The golf ball has decreasing velocity.

• The golf ball is accelerating.

• The golf ball has zero acceleration.

S8P3c ~ 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

19. S8P3c ~ People are riding buses to work in the morning. The buses are all the same, but they are carrying different numbers of people. The buses are going the same speed, and each bus is one block away from its next stop. Based on the chart, order the buses from least to greatest to show the size of the force applied to each bus.

• B43, M2, CT5, X9, SL1

• SL1, X9, CT5, M2, B43

• B43, CT5, M2, SL1, X9

• X9, SL1, M2, CT5, B43

Tags

NGSS.MS-PS2-2

S8P3c ~ 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