Questions
Two blocks A(2 kg) and B(5 kg) rest one over the other on a smooth horizontal plane. The coefficient of static and dynamic friction between A and B is the same and is equal to 0.60. The maximum horizontal force that can be applied to B in order that both A and B do not have relative motion is TAKE g= 10 ms-2
detailed solution
Correct option is B
Let due to a force F on B, both blocks A and B, both blocks A and B move together. In this case,F=mA+mBa=(2+5)a∴ a=(F/7)Now force on A=m a=2×(F/7)For no relative motion between A and B, (2F / 7) must not exceed the limiting force of friction between, A and B. The limiting force of friction between A and B is given byμmAg=0⋅6×2×g∴ 2F7=0⋅6×2×gF=4⋅2N g=4⋅2kgf.Talk to our academic expert!
Similar Questions
A 4 kg block A is placed at the top of 8 kg block B which rests on a smooth table. A just slips on B when a force of 20 N is applied on A. The maximum horizontal force F required to make both A & B move together is
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests