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

In a figure shown below, the work done by force of friction on the block is


A
Zero
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Positive
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Negative
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
cannot be determined
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Zero
Given, mass of block (m)=5 kg
Applied force (F)=40 N
By the FBD of the block:

R=5g=50 N

(fs)max=μsR=0.8×50=40 N

Since the external force and frictional force are equal and opposite, the body is at rest.
There is no displacement of the block.
The work done by force of friction is zero. (W=fs=0)

Hence option A is correct.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
So You Think You Know Work?
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon