Question

Slim Jim lifts a 40 kg object up 3.5mA. How much energy does it have before it is lifted?B. What kind of energy will it gain?C. Where does this energy come from?D. Calculate the box's energy after it is liftedThank you muchh!

Answer 1

Given that the mass of an object is m = 40 kg.

The height is h = 3.5 m

A) The object has zero potential energy before it is lifted as the height from the ground is zero.

B) The energy gained by the object when it is lifted is the gravitational potential energy which increases with an increase in height.

C) This energy is gained by lifting the object against the force of gravity.

D) The box's energy after being lifted is

`\begin{gathered} E=\text{mgh} \\ =40*9.8*3.5 \\ =1372\text{ J} \end{gathered}`

Here, g = 9.8 m/s^2 is the acceleration due to gravity.

Thus, the energy after the box is lifted is 1372 J