Nội dung text Friction (Fill.Q.) E.pdf
PHYSICS Q.1 A block of mass m = 10 kg is to be pulled on a horizontal rough surface with the minimum force. F μ = 0.75 (i) The block should be pulled at an angle = ....................... (ii) The magnitude of the force F is equal to ...................... Ans. (i) tan–1 (0.75) = 37o, (ii) 6 N Q.2 A man of mass 'm' is standing in a bus which is accelerating with constant acceleration 'a' on a horizontal road. If man manages to stand without touching any other part of bus, force on man due to floor of bus is .............. Ans. m 2 2 a g