Kinematic Equations

A car is traveling to the right with a speed of 29​​m/s when the rider slams on the accelerator to pass another car. The car passes in 110 m with constant acceleration and reaches a speed of 34m/s. We want to find the acceleration of the car as it sped up. What equation should you choose?

• v=v_o+at

• d=v_ot+1/2at²

• v²=v_o²+2ad

• d=1/2(v+v_o)t

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NGSS.HS-PS2-1

A dog basks in the sun when he sees a squirrel and bolts after it. If the dog accelerates at +1.6 m/s/s, how far does he run in 3 seconds?

• 4.8 meters

• 45 meters

• 1.6 meters

• 7.2 meters

Tags

NGSS.HS-PS2-1

The unit we use to measure acceleration is ___.

• m/s

• m

• s

• m/s²

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NGSS.HS-PS2-1

If an object starts from rest, what is its initial velocity?

• Depends on the problem

• 0

• -9.8m/s²

• Always positive

Solve for "a" given v = v₀ + at

• a = (v₀-v)/t

• a = (v-v₀)/t

• a = t/(v-v₀)

• a = t/(v₀-v)

Tags

NGSS.HS-PS2-1

What happens to the velocity of a ball as it is dropped off a cliff? 

• It decreases at a uniform rate 

• It increases at a uniform rate 

• It is constant 

• It increases at a non-uniform rate

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NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-1

A boat travels 12.0 m while it reduces its velocity from 9.5 m/s to 5.5 m/s. What is the magnitude of the boat’s acceleration while it travels the 12.0 m?

• 1.3 m/s²

• 2.5 m/s²

• 3.0 m/s²

• 7.5 m/s²

Tags

NGSS.HS-PS2-1

A ball is dropped from a building. How fast is it traveling after falling for 1.77 s? (Hint: It's a free falling object)

• 14.76 m/s

• 17.35 m/s

• 18.91 m/s

• 20.03 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s². The takeoff speed for this plane will be 65 m/s. All airplanes will start from rest. Assuming this minimum acceleration, what is the minimum allowed length for the runway?

• v=v_o+at

• d=v_ot+1/2at²

• v²=v_o²+2ad

• d=1/2(v+v_o)t

Tags

NGSS.HS-PS2-1

*How long will it take a running horse to travel 260 m and attain a speed of 12 m/s from rest?

• 1200 seconds

• 1.2 hours

• 43 minutes

• 43 seconds