Answer:
The braking distance would be 4 times greater
Step-by-step explanation:
A moving car has kinetic energy. To bring the car to rest, you must decrease its kinetic energy to zero. The brakes do this work by applying a force over a distance. What effect would doubling the speed have on the braking distance?
kinetic energy is the energy possessed by a body due to motion. the unit is in joules
m=mass of the car,
mass is he quantity of matter in a body
v=velocity possess by the car, velocity is change in displacement per time
ke=1/2mv^2
when V is doubled
we have
Ke2=1/2m(2V)^2
Ke2=1/2m4v^2
Ke2=4(1/2mv^2)
Ke2=4ke
The braking distance would be 4 times greater