Which statements about braking a car are true?
the greater the kinetic energy of a car, the longer it takes for the car to stop.
the lower the kinetic energy of a car, the longer it takes for the car to stop.
if the speed of a car doubles, the car’s kinetic energy and braking distance quadruple.
if the speed of a car doubles, the car’s kinetic energy and braking distance remain the same.

C. If the speed of a car doubles, the car’s kinetic energy and braking distance quadruple. And A.The greater the kinetic energy of a car, the longer it takes for the car to stop.

The greater the kinetic energy of a car, the longer it takes for the car to stop.

If the speed of a car doubles, the car’s kinetic energy and braking distance quadruple.

Explanation:

The kinetic energy is given by the formula,

½ mv²

where m is the mass and v is the velocity.  

So when the velocity or speed doubles the kinetic energy will quadruple.  

A car moving with high kinetic energy has a high speed or velocity therefore it is going to take more time to reduce the higher speed and bring the car to a halt.  

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explanation:

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