Answered

If you lift a five pound object 18 inches how many joules of energy did yo use?

Sagot :

The answer is 3.6 because i divid 18 by 5

Answer:

-10.17 J

Explanation:

Work done = weight x displacement

weight = 5 pound

          = (5 x 4.45) N

          = 22.25 N

Displacement = 18 inches

1 inch = 0.0254 m

18 in = 0.4572 m

Work done = 22.25 N x 0.4572 m x cos 180°

                  = -10.17 J

Thus, the amount of energy used to lift 5 pound object to 18 inches, 10.17 J of energy is used.