CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

A particle of mass 1 kg was sliding with a velocity of 10 m/s on a rough floor. It comes to rest after 5s. The rate at which floor warms up is



A

5 W

loader
B

10 W

loader
C

15 W

loader
D

20 W

loader

Solution

The correct option is B

10 W


The rate at which floor warms up is the rate at which friction does work. Due to friction between floor and particle heat would be produced and the work done by friction would be dissipated as heat.So, the rate at which floor warms up would be equal to the rate of frictional work i.e. 1/2 x 1 x 102 = 50J and 50/5 = 10W. Whole of the kinetic energy possessed by the body would be dissipated as heat due to the negative work done by friction


Competitive Exams

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
People also searched for
View More



footer-image