Forces 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_i+at

• d=v_it+1/2at²

• v²=v_i²+2ad

• d=1/2(v+v_i)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-PS2-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

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 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_i+at

• d=v_it+1/2at²

• v²=v_i²+2ad

• d=1/2(v+v_i)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_i+at

• d=v_it+1/2at²

• v²=v_i²+2ad

• d=1/2(v+v_i)t

Tags

NGSS.HS-PS2-1

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_f=v_i+at

• d=v_it+1/2at²

• v_f²=v_i²+2ad

• d=1/2(v_f+v_i)t

Tags

NGSS.HS-PS2-1

The unit we use to measure speed is ___.

• m/s

• m

• s

• m/s²

Tags

NGSS.MS-PS3-1

The unit we use to measure distance is ___.

• m/s

• m

• s

• m/s²

The unit we use to measure time is ___.

• m/s

• m

• s

• m/s²