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

All the blocks shown in the figure are at rest. The pulley is smooth and the strings are light. Coefficient friction at all the contacts is 0.2. A frictional force of 10 N acts between A and B. The block A is just about to slide on block B. Then

A
The normal reaction exerted by the ground on the block B is 110 N
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
The normal reaction exerted by the ground on the block B is 50 N
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
The frictional force exerted by the ground on the block B is 20 N
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
The frictional force exerted by the ground on the block B is zero.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D The frictional force exerted by the ground on the block B is zero.

The frictional force on block A is
μN1=10N1=100.2=50 N
The net force on block B in vertrical direction is zero
N2=50+N1+10=110 N
Normal reaction exerted by ground on block B is 110 N.
The net force on block B in horizontal direction is zero
f+1010=0
frictional force exerted by ground on block B is zero

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Warming Up: Playing with Friction
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon