Motion PS.7.1 #2

When a car goes around a corner at 20 mph, why do we say it  accelerates?

• The car is accelerating because of the velocity is constant
• The car accelerates because it's going 20 mph
• Cars always accelerate when they are in motion
• The car is accelerating because it's changing direction

Acceleration only takes place when things speed up. 

• True
• False

The rate that a car's velocity changes is its

• speed

• force

• gravity

• acceleration

Which of the following is accelerating?

• A ball that picks up speed as it rolls down the hill.

• A car that brakes to a stop to avoid a crash.

• A racecar that travels around a curve at a constant speed.

• All of these are examples of Acceleration.

Tags

NGSS.MS-PS2-2

A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.

• 2.2m/s²
• 7.0m/s²
• 5.7m/s²
• 70m/s²

Tags

NGSS.MS-PS2-2

A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?

• 0 m/s
• 40 m/s²
• -40 m/s²
• 40 m/s

Tags

NGSS.MS-PS2-2

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

• 24 m/s²

• 18 m/s²

• 16 m/s²

• 16 m/s

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A Ninja motorbike travelling at 55 m/s takes 5 sec to come to rest. What is its deceleration rate?

• 11 m/s²

• -11 m/s²

• -11 m/s

• 10 m/s²

Tags

NGSS.HS-PS2-1

A marble rolling at 10 m/s slows to 2 m/s in 16 seconds. What is the acceleration of the marble?

• 0.5 m/s²
• 2 m/s²
• -0.5 m/s²
• -2 m/s²

A dog runs with an initial speed of 7.5 m/s on a waxed floor.  It slides to a stop in 15 seconds.  What is the acceleration?

• -7.5 m/s
• -7.5 m/s²
• -0.5 m/s²
• 7.5 mi//hr

Tags

NGSS.MS-PS2-2