NEET 2017 Question Paper - Code B - Mock Test

A rope is wound around a hollow cylinder of mass $3\text{kg}$ and radius $40\text{cm}$. What is the angular acceleration of the cylinder if the rope is pulled with a force of $30\text{N}$?

Two discs of same moment of inertia rotating about their regular axis with angular velocities ${\omega }_1$ and ${\omega }_2$. They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is:

A gas mixture consists of $2$ moles of ${\text{O}}_2$ and $4$ moles of $\text{Ar}$ at temperature $T$. Neglecting all vibrational modes, the total internal energy of the system is:

The bulk modulus of a spherical object is ‘$B$ ’. If it is subjected to uniform pressure ‘$p$ ’, the fractional decrease in radius is:

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 produces both translational and rotational motion in a body.(d) Mechanical advantage greater than one means that small effort can be used to lift a large load.