Questions
Find the acceleration of the body if a force F - 8 N pulls the string at P that passes over the body and it is connected by another string to a rigid support at Q.(Take radius of
gyration and mass of the body m=3 kg)
detailed solution
Correct option is A
a=αRF−T=ma .......(i) Torque about C: TR−Fr=Iα⇒ TR−Fr=mk2aRPut the value of T from equation (i)(F−ma)R−Fr=mk2aRF(R−r)=amk2R+mR⇒a=FR(R−r)k2+R2m=8×2×(2−1)43+4×3=8×2×14×43×3=1m/s2Talk to our academic expert!
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A uniform rood AB of length and mass is free to rotate about point A. The rod is released from rest in the horizontal position. Given that the moment of inertia of the rod about A is , the initial angular acceleration of the rod will be
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