wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following statements is correct about a freely falling body?

1. Total energy is constant.
2. Potential energy changes into kinetic energy.
3. Potential energy decreases.
4. Kinetic energy increases.


A

Only 1 and 2

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

Only 3 and 4

No worries! We‘ve got your back. Try BYJU‘S free classes today!
C

Only 2, 3 and 4

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

All 1, 2, 3, and 4

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D

All 1, 2, 3, and 4


According to the principle of conservation of energy, energy can neither be created nor can it be destroyed. It can be only changed from one form to another. When the body is at the highest point, its velocity is zero so the kinetic energy is zero. The only energy it has is potential energy. When the body starts falling, its velocity increases and its kinetic energy starts increasing. Since energy cannot be created, total energy has to be constant. Moreover, when the body starts falling, its height decreases and hence potential energy decreases. It can be shown that an increase in kinetic energy is equal to the decrease in potential energy.

Hence, all the above statements given in the question are correct.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Law of Conservation of Energy
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon