Year: 2017
Topic: System of particles and rotational motion
Time :
1.
Which of the following statements are correct?
(1) Centre of mass of a body always coincides with the centre of gravity of the body.
(2) Centre of mass of a body is the point at which the total gravitational torque on the body is zero.
(3) A couple on a body produces both transnational and rotational motion in a body.
(4) Mechanical advantage greater than one means that small effort can be used to lift a large load.
(1) Centre of mass of a body always coincides with the centre of gravity of the body.
(2) Centre of mass of a body is the point at which the total gravitational torque on the body is zero.
(3) A couple on a body produces both transnational and rotational motion in a body.
(4) Mechanical advantage greater than one means that small effort can be used to lift a large load.