Brenda and taylor push their car into the driveway because it will not start .the car ha a mass of 850 kg. they apply a force of 800 n for 30 seconds to move the car 15 m. (use correct units in all answers.)

a. how much work do they perform?

b. what is their power?

Explanation:

Given that,

Mass of the car, m = 850 kg

Force applied, F = 800 N

Time, t = 30 s

Distance covered, d = 15 m

To find,

(a) work done

(b) Power

Solution,

(a) Let W is the work done. The product of force and displacement is called work done. Its expression is given by :

W = 12000 J

(b) The work done divided by time taken is called power of an object. It is given by :

P = 400 W

the area between the graph and the t axis