Mechanics and Kinematics

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

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

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

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

Kinematic equation can only be used when you have a constant ....

• Position

• Velocity

• Acceleration

• Time

The unit we use to measure acceleration is ___.

• m/s

• m

• s

• 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

A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a distance of 110 m. Determine the acceleration of the car. Choose the appropriate equation.

• 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

Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.83 seconds, then what is the distance that the sled travels?

Choose the appropriate equation.

• 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

If Michael Jordan has a vertical leap of 1.29 m, then what is his takeoff speed if his acceleration is -9.8 m/s² and his velocity at the top of his leap i 0 m/s?

• v=v_o+at

• d=v_ot+1/2at²

• v²=v_o²+2ad

• d=1/2(v+v_o)t

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