Two blocks A and B of masses m and 2m respectively are connected together by a light spring of stiffness k and then placed on a smooth horizontal surface. The blocks are pushed towards each other the block A by the spring, by the time the spring acquires its natural length, is (A)
(B)
(C)
Physics
Part 1
Straight Objective Type
This section contains 8 multiple choice questions numbered 1 to 8. Each question has 4 choices (A), (B), t of which ONLY ONE is correct.
A disc of radius R is rolling without slipping on a fixed circular track of radius 2R. Line joining the centre of the disc and centre (O) of circular track is rotating with constant in clockwise sense. A rod AB whose end to a small ring which can move only along a fixed horizontal rod and other end of rod B is pivoted at B, R/2 distance above centre of disc as shown. Find the angular velocity of rod AB at the instant when rod AB is making an with horizontal and centre of the disc is directly above the centre (O) of the track as shown in figure.(Assume rod can rotate freely about hinge point B)
Two blocks A and B of masses m and 2m respectively are connected together by a light spring of fness k and then placed on a smooth horizontal surface. The blocks are pushed towards each other the block by the spring ,by the time the spring acquires its natural length,is
