wiz-icon
MyQuestionIcon
MyQuestionIcon
3
You visited us 3 times! Enjoying our articles? Unlock Full Access!
Question

Three blocks m1,m2 and m3 of masses 8 kg,3 kg and 1 kg are placed in contact on a smooth surface. Forces F1=140 N and F2=20 N are acting on blocks m1 and m3 respectively as shown. The reaction between blocks m2 and m3 is

A
2.5 N
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
7.5 N
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
22.5 N
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
30 N
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 30 N
Considering blocks as single mass
14020=12a
a=10 m/s2 which is towards right direction
Now FBD of m3
Let T be the reaction force on the block .
Acceleration of 1 kg block will also be towards right
T20=1(10)
T=30 N

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Second Law of Motion
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon