Question

Look at the picture below. The boy is swinging back and forth on the swing. At which point is the potential energy of a swing the least?

Question 3 options:

Point A (at the top)


Point B (halfway back)


Point C (at the bottom)


Point D (halfway up)

Answer 1

it is C I took the test

Answer 2

Answer : Potential energy is least at point C.

Explanation :

In the given figure, the boy is swinging back and forth on the swing. We know that the potential is possessed by an object by virtue of its height under the action of the gravity.

Mathematically it is given as :

PE = mgh

Where,

m is the mass of the object

g is the acceleration due to gravity

h is the height attained by the particle.

At point C the potential energy of a swing is least because the height from the ground at C is least i.e h = 0 which gives the potential energy zero.