Question

Calculate the height through which a body of mass 0.5 kg should be lifted if the energy spent for doing so is 1.0 joule.

• A. 0.5 m
• B. 0.2 m
• C. 0.1 m
• D. 2.0 m

Answer 1

The correct option is B

0.2 m

Given: m = 0.5 kg and g = 10 m s^-2.

Using the formula U = mgh, we get:

1.0 = 0.5 X 10 x h

Thus h = ¹/₅ = 0.2 m, Which is the required height