Sam is riding his bike and spots a sinkhole. He slows his bike from 14.0 m/s to 2.0 m/s in 6.0 seconds. What is the bike's negative acceleration?

• 0.33 m/s²

• 2.0 m/s²

• 2.3 m/s²

• 12.0 m/s²

Tags

GA.SPS8.a.

A car is accelerated at 4.0 m/s2 from rest. How long does it take the car to reach a speed of 28 meters per second?

• 3.5 s

• 7.0 s

• 14 s

• 24 s

Tags

GA.SPS8.a.

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?

• 3 m/s²

• 8.7 m/s²

• 1.8 m/s²

• 4.8 m/s²

Tags

GA.SPS8.a.

A runner covers the last straight stretch of a race in 4 s. During that time, he speeds up from 5 m/s to 9 m/s.

What is the runner’s acceleration in this part of the race?

• 3.5 m/s²

• 1.0 m/s²

• 2.3 m/s²

• 1.3 m/s²

Tags

GA.SPS8.a.

Why does a car accelerate as it round a corner at a constant speed?

• Its direction changes

• It slows down

• It doesn't

• Its speeds up

Tags

GA.SPS8.a.

A positive acceleration means that your object is

• at rest

• moving

• speeding up

• slowing down

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GA.SPS8.a.

A negative acceleration means that your object is

• at rest

• moving

• speeding up

• slowing down

Tags

GA.SPS8.a.

A roller coaster accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?

• 24 m/s²

• 16 m/s²

• 18 m/s²

• 16 m/s

Tags

GA.SPS8.a.