A920-kg car with brakes applied travels at constant speed a distance of 8 m downhill along a road that makes an angle of 30o below the horizontal. the work w done by the force of gravity during this motion is:

W = 36064 J

Explanation:

Work done by the force of gravity is given as

here we know that

also we have

= vertical displacement of the car in downward direction

now we have

now work done is given as

c.the charges if the proton and electron and gravity

d) physical means can be used to separate the components of air.