Acceleration

A car goes from 0 to 30 m/s in 6 seconds. What is the car's acceleration? 

• 5 m/s/s
• 10 m/s/s
• 20 m/s/s
• 15 m/s/s

How can you change the acceleration in a car? ( Hint: You can FEEL a change in acceleration)

• The steering wheel 
• The brake pedal
• The gas (the accelerator) 
• All of the above 

If you are in a car and you change direction, what are you doing?

• changing my velocity 
• accelerating 
• B and C 
• None of the above.

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.HS-PS2-1

A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration? Is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds?

• 2.67 m/s², higher
• 2.67 m/s², lower
• 3.75 m/s², lower
• 3.75 m/s², higher

A car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. Find the car’s  acceleration.

• 10 m/s
• 10 m/s²
• 1 m/s²
• 4.5 m/s²

A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s  acceleration?

• 2 m/s
• 2 m/s²
• 2
• 2 m

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?

• 1 m/s²
• -1 m/s²
• 1.25 m/s²
• .11 m/s²

You are traveling in a car that is moving at a velocity of 20 m/s. Suddenly, a car 10 meters in front of you slams on it’s brakes. At that moment, you also slam on your brakes and slow to 5 m/s. Calculate the acceleration if it took 2 seconds to slow your car down.

• 7.5 m/s²
• -7.5 m/s²
• 5 m/s²
• 15 m/s²

A ball is dropped from the top of a building. After 2 seconds, it’s speed is measured to be 19.6 m/s. Calculate the acceleration for the dropped ball.

• 9.8 m/s
• 9.8 m/s²
• -9.8m/s²
• 13 m/s²