acceleration

An object has an acceleration of 2 m/s². How long to reach 20 m/s, if V_i=10 m/s?

• 1s

• 3s

• 5s

• 30s

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

A ball of clay is thrown at a wall at a velocity of 28.0 m/s.  After it hits the wall, it takes 0.020 s to stop.  What is the acceleration of the clay when it hits the wall?

• 1400 m/s²
• -1400 m/s₂
• 0.56 m/s²
• -0.56 m/s²

A box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest.  Find 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

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

The unit for Acceleration is usually

• m/s

• m/s²

• m

• s

Billy was driving his car and when he reached the tollbooth he slowed from 190m/s to 12m/s in 20 seconds. What was the magnitude for his negative acceleration of the car?

• -8.9m/s²

• 8.9m/s²

• 9.8m/s²

• -9.8m/s²

The speed boats speed increased from 0m/s to 24m/s in a time span of 12 seconds. What was its rate of acceleration?

• 4 m/s²

• 2 m/s²

• 8 m/s²

• 6 m/s²