Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.
The increase of potential energy of the box is 100 J.

Question

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. 
The increase of potential energy of the box is 100 J.

Quizplus · Accepted Answer

The formula for potential energy is PE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the change in height. In this case, the potential energy increase is 100 J, the mass is not given, but the weight is 20 N, and the change in height is 5 m. Using the given weight, we can find the mass (m=20N/9.81m/s^2=2.04 kg). Then, using the formula for potential energy, we can solve for the change in height: 100 J = (2.04 kg)(9.81 m/s^2)(Δh), Δh = 5 m. Therefore, the statement is true.

Consider a Situation Where You Carry a 20-N Box Up