Related InterviewSolutions

• `PQR` is a wedge fixed to the floor. Two blocks `A` & `B` of equal mass `m=1kg` is placed on either side of wedge connected through a string passing over the pulley `P`. Initially `PB=PA`. Another block `C` of mass `m=1kg` moving with a velocity `10m//s` collides inelasically with `A`. All the surfaces are smooth and pulley & string are massless. (`a`) What should be the minimum length of the string `AB` so that block `A` does not hit the pulley ? (`b`) What is the loss in meechanical energy from the instant `C` hits `A` to the instant when `B` starts moving upward ? (`g=10m//s^(2)`)
• A particle of mass `m` is released from height `h` on smooth quarter circular fixed wedge. The horizontal surface `AB` following the circular path at bottom of wedge is rough with coefficient of friction `mu` between surface and `m`. Find the distance from bottom of wedge where the mass will stop. A. `(2h)/(mu)`B. `(h)/(mu)`C. `(h)/(mug)`D. none of these
• An iron ball of mass `m`, suspended by a light inextensible string of length `l` from a fixed point `O`, is shifted by `theta_(0)` as shown so as to strike the vertical wail perpendicularly.The maximum angle made by the string with vertical after the first collision, if `e` is the coefficient of restitution, is A. `sin^(-1){1-e^(2)(1-costheta_(0))}`B. `cos^(-1){1-e^(2)(1-costheta_(0))}`C. `tan^(-1){1-e^(2)(1-costheta_(0))}`D. zero
• A ping-pong ball of mass `m` is floating in air by a jet of water emerging out of a nozzle. If the water strikes the ping-pong ball with a speed `v` and just after collision water falls dead, the mass flow rate of water in the nozzle is equal to :A. `(2mg)/(v)`B. `(mv)/(g)`C. `(mg)/(v)`D. None of these