Which of the following statements are correct ?(a) centre of mass of a body always coincides with the centre of gravity of the body.(b) Centre of mass of a body is the point at which the total gravitational torque on the body is zero.(c ) A couple on a body produce both translational and rotational motion in a body(d) Mechanical advantage greater than one means that smell effort can be used to lift a large load.

Which of the following statements are correct ?(a) centre of mass of a

1.	Which of the following statements are correct ?(a) centre of mass of a body always coincides with the centre of gravity of the body.(b) Centre of mass of a body is the point at which the total gravitational torque on the body is zero.(c ) A couple on a body produce both translational and rotational motion in a body(d) Mechanical advantage greater than one means that smell effort can be used to lift a large load.
Answer» (C ) and (d) (B) and (d) (a) and (b) (b) and (c ) ANSWER :B