# Loss in kinetic energy

1. ### xto

5
What formula should i use to calculate
the loss in kineti energy during braking and
the power dissipated as heating in the brake
do i just use ke=1/2mv^2 and work done =force x distance ?

2. ### Andrew Mason

6,876
Yes. The braking force x stopping distance (assuming constant braking force) is equal to the loss of kinetic energy of the vehicle.

AM

3. ### Saketh

262
And if it's not constant, you can integrate the dot product of the force vector and the differential x-vector.

If you want the power of heat generation, you will need to find how much energy is being dissipated (i.e. how much kinetic energy is lost) per unit of time.