CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

A satellite is revolving round the earth in an elliptical orbit.


Correct Answer
A
Gravitational force on satellite may be greater than centripital force
Correct Answer
B
Work done by gravitational force for some small duration may be negative
Correct Answer
C
Power of gravitational force may be zero at an instant
Your Answer
D
Power of gravitational force is always zero.

Solution

The correct options are
A Gravitational force on satellite may be greater than centripital force
B Work done by gravitational force for some small duration may be negative
C Power of gravitational force may be zero at an instant
The gravitaional force and centripetal force are not always equal when a planet is going in an elliptical orbit. Gravitational force can provide both centripetal and tangential force, so it can be greater than centripetal force. The speed of the planet is increasing and decreasing as it is revolving. This means, gravitational force is doing positive work sometimes and negative work some other time and hence, power is not always zero. Further, when the velocity of the planet is perpendicular to the gravitational force, the power delivered by the force is zero.

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More


People also searched for
View More



footer-image