NEET 2016

A rigid ball of mass strikes a rigid wall at $$60^0$$ and gets reflected without loss of speed as shown in the figure below. The value of impulse imparted by the wall on the ball will be

A bullet of mass 10g moving horizontally with a velocity of $$400 ms^{-1}$$ strikes a wooden block of mass 2 kg which is suspended by a light inextensible string of length 5 m. As a result, the centre of gravity of the block is found to rise a vertical distance of 10 cm. The speed of the bullet after it emerges out horizontally from the block will be

Two identical balls A and B having velocities of $$0.5\frac{m}{s}$$ and $$-0.3\frac{m}{s}$$ respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be

A particle moves from a point $$(-2\widehat{i}+5\widehat{j})$$ to $$(4\widehat{j}+3\widehat{k})$$ when a force of $$(4\widehat{i}+3\widehat{j})N$$ is applied. How much work has been done by the force?

Two rotating bodies A and B of masses m and 2m with moments of inertia $$I_A$$ and $$I_B(I_B>I_A)$$ have equal kinetic energy of rotation. If $$L_A$$ ans $$L_B$$ be their angular momenta respectively, then

A non-proteinaceous enzyme is

Select the mismatch.

Select the wrong statement.

A cell organelle containing hydrolytic enzymes is

During cell growth, DNA synthesis takes place in