To move a refrigerator of mass 150 kg into a house, a mover puts it on a dolly and covers the steps leading into the house with a wooden plank acting as a ramp. The plank is 7.8 m long and rises 3.3 m. The mover pulls the dolly with constant velocity and with a steady force 1500 N up the ramp. a)How much work does he perform? The acceleration of gravity is 9.8 m/s. Answer in units of J.
b)What is the minimal work required to lift the refrigerator into the house? Answer in units of J.

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Explanation:

I need credits so pretend this isn't a answer pls

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

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