A ball rolling on the ground represent
a) rectilinear motion
b) rotation motion
c) both a) and b)
d) none of these ​

Gandhiji was the staunch supporter of a) big industries b) cottage industries c) both 'a' and 'b' d) None of these

Rotational Motion - Pure Rolling

Boojho was riding in his bicycle along a straight road. He classified the motion of various parts of the bicycle as (i) rectilinear motion, (ii) circular motion and (iii) both rectilinear as well as circular motion. Can you list one part of the bicycle for each type of motion? Support your answer with reason.

An electric dipole of dipole moment p, is held perpendicular to an electric field. If the dipole is released does it have (a) only rotational motion (b) only translatory motion (c) both translatory and rotatory motion explain?

Which of the following examples examples represent (nearly) simple harmonic motion and which represent periodic but not simple harmonic motion? (a) The rotation of earth about its axis. (b) Motion of an oscillating mercury column in a U tube, (c) Motion of a ball bearing inside a smooth curved bowl, when released from a point slightly above the lower most position. (d) General vibrations of a polyatomic molecule about its equilibrium position.

Read each statement below carefully and state with reasons, if it is true ot false. (a) During rolling the force of friction acts in the same direction as the direction of motion of c.m of the body. (b) The instantaneous speed of the point of contact during rolling is zero. (c ) The instantaneous acceleration of the point of contact during rolling is zero. (d) For perfect rolling motion, work done against friction is zero. (e) A wheel moving down a perfectly frictionless inclined plane will undergo slipping (not rolling motion).

A ball of radius r hits a cushion with a pure rolling motion and rebounds, with a pure rolling motion. Find the ratio of the height h of the cushion to the radius r of the ball. Assume that the foce exerted on the ball by the cushion is horizontal during the impact and that the ball hits the cushion normally.

Assertion: A ball is released on a rough ground in the condition shown in figure. it will start pure rolling after some time towards left side. Reason: Friction will convert the pure rotational motion of the ball into pure rolling

A ball rools at constant speed in a straight line along the ground. Jerry kicks the ball in the direction of its motion. As a result of Jerry's kick, speed of the ball will