Average Acceleration

Which of the following is a unit for acceleration?

• km/s

• m/s²

• mi/hr

• ft

A roller coasters 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

• 18 m/s²

• 16 m/s²

• 16 m/s

Tags

NGSS.MS-PS2-2

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

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

The change in speed or direction something's motion in a single unit of time

Homer was riding his bike at 250 meters/minute. After being chased by a dog for 2 minutes, he sped up and traveled 300 meters/minute. What was his acceleration?

• 45 meters/minute²

• 25 meters/minute²

• -50 meters/minute²

• 160 meters/minute²

Acceleration occurs when an object changes its speed or (a)  

• direction

• force

• inertia

• mass

Tags

NGSS.MS-PS2-2

Which of the following is a real-life example of acceleration?

• A car moving at a constant speed on a highway.

• A roller coaster speeding up as it goes downhill.

• A person standing still.

• A bicycle coasting at a steady speed.

Tags

DOK Level 2: Skill/Concept

A golf ball accelerates off a tee at 15m/s², changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?

• 750 seconds

• 35 seconds

• 0.3 seconds

• 3.3 seconds

Tags

NGSS.HS-PS2-1

Suppose your bike accelerates from 2 m/s to 11 m/s in 3 seconds. What is your average acceleration?

• 3 m/s

• -3 m/s/s

• 3 mph

• 3 m/s/s

• 4.5 m/s/s