A total of 4900 J is expended in lifting a 50-kg mass. The mass is raised to a height of
A) 10 m.
B) 98 m.
C) 960 m.
D) 245,000 m.

Question

Quizplus · Accepted Answer

The potential energy gained by lifting an object to a certain height h is given by the formula:
PE = mgh
where m is the mass of the object, g is the acceleration due to gravity (9.8 m/s^2), and h is the height.

In this case, we are given that 4900 J of energy is expended and the mass is 50 kg. We can rearrange the formula to solve for h:
h = PE / (mg)

Substituting the given values, we get:
h = 4900 J / (50 kg x 9.8 m/s^2) = 10 m

Therefore, the best choice is A) 10 m, as this is the height to which the mass was raised.

A Total of 4900 J Is Expended in Lifting a 50-Kg