Three blocks m1,m2 and m3 of masses 8kg,3kg and 1kg are placed in contact on a smooth surface. Forces F1=140N and F2=20N are acting on blocks m1 and m3 respectively as shown. The reaction between blocks m2 and m3 is
A
2.5N
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
7.5N
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
22.5N
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
30N
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution
The correct option is D30N Considering blocks as single mass ⇒140−20=12a a=10m/s2 which is towards right direction
Now FBD of ′m′3
Let T be the reaction force on the block .
Acceleration of 1 kg block will also be towards right T−20=1(10) T=30N