Acceleration

The equation for acceleration is...

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A positive acceleration means that your object is _____.

• not accelerating

• not moving

• speeding up

• slowing down

A negative acceleration means that your object is _____. 

• not accelerating
• not moving
• speeding up 
• slowing down 

What is the acceleration of a car that speeds up from 0mph to 50mph in 4.0s?

• 12.5 mph/s

• .08 mph/s

• 200 mph/s

What is the acceleration of a car that slows from 80 mph to 40 mph in 5 seconds?

• 8 mph/s

• -8 mph/s

• 16 mph/s

• -16 mph/s

A box sliding down the stairs attains a velocity of 27 m/s in 3 seconds from rest. What is the acceleration?

• 30 m/s

• 24 m/s²

• 9 m/s²

• 81 km/hr

A roller coasters accelerates from an initial velocity of 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

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

What car has the fastest acceleration?

• Car goes from 0-60 Mph in 3 seconds
• Car goes from 0-60 Mph in 4 seconds
• Car goes from 0-60 Mph in 5 seconds
• Car goes from 0-60 Mph in 6 seconds

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