Question

You need to move your 2 kg physics book from the dinner table. You lift it to the shelf that is 3 m above the table. How much work was done?

Answer 1

W = 58.86 J ≈ 60 J

Step-by-step explanation:

d = 2 m

m = 3 kg

g = 9.81 m/s2

W = ?

W = (mg)d (W = Fd)

(mg is equal to weight in Newtons, or the force, F, to lift something in Newtons)

W = (3 kg)(9.81 m/s2)(2 m)

W = 58.86 J ≈ 60 J

Answer 2

w= f x d 1 KG = 9.8 Newton
w=19.61N X 3M
58.83