CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

A small sphere of mass $$M$$ is dropped from a great height, after it has fallen $$100$$ m, it has attained its terminal velocity and continues to fall at that speed. The work done by air friction against the sphere during the first $$100$$ m of fall is (g = acceleration due to gravity)


A
greater than the work done by air friction in the second 100 m
loader
B
less than the work done by air friction in the second 100 m
loader
C
equal to 100 Mg
loader
D
greater than 100 Mg
loader

Solution

The correct option is B less than the work done by air friction in the second 100 m
The air friction i.e. the viscous force is lower in the first half, because viscous force being proportional to velocity attains a maximum value at the terminal velocity. As the force is lower in the first 100 m the work done would also be lower compared to the next 100 m.

Physics

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
People also searched for
View More



footer-image