ENERGY = POWER X TIME
=60 X 120=7200KWh
Potential energy and kinetic energy
the sodium chloride will be a crystal
it will have a giant crystal lattice
With same braking power you will be stopping faster on the original weight therefore the answer to fill the blank is increase. The stopping distance will increase as there'll be higher energy to dissipate than lighter cars applied with the braking force similar with that of the lighter car. Also the skid and drag will add to the distance as well as the inertia of the moving heavier vehicle would be greater as well.
Answer:

Explanation:
= Displacement = 
= Time taken = 
Velocity is given by

The person is able to run at a speed of
in order to complete the race in the given time.