Which of the foUowing is not conserved in inelastic collision?

How much amount of energy is liberated to convert 1kg of coal into energy?

A particle of mass m₁ moves with velocity V₁ collides with another particle at rest of equal mass. The velocity of second particle after the elastic collision is

The ratio of spring constants of two springs is 2 : 3. What is the ratio of their potential energy if they are stretched by the same force?

A force \(\mathbf{F}=5 \hat{\mathbf{i}}+6 \hat{\mathbf{j}}-4 \hat{\mathbf{k}}\) acting on a body produces a displacement s \(=6 \hat{\mathbf{i}}+5 \hat{\mathbf{k}}\) .The work done by the force is

A body of mass 0.5 kg travels in a straight line by applying a force \(F=\frac{3}{2} m a^{2} x^{2}\) where a = \(5 \mathrm{~m}^{-1 / 2} \mathrm{~s}^{-1}\) The work done by the net force during its displacement from x = 0 to x = 2 m is

A body is moving along a circular path. How much work is done by the centripetal force?

A particle is pushed by forces \(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}-2 \hat{\mathbf{k}}\) and \(5 \hat{\mathbf{i}}-\hat{\mathbf{j}}-3 \hat{\mathbf{k}}\) simultaneously and it is displaced from point \(\hat{\mathbf{i}}+\hat{\mathbf{j}}+\hat{\mathbf{k}}\) to point \(2 \hat{\mathbf{i}}-\hat{\mathbf{j}}+3 \hat{\mathbf{k}} .\) The work done is

What is the dimensions of power:

Dimensions of spring constant is:

The momentum of a particle is numerically equal to the KE. The velocity of the particle is

When the force is retards the motion of a body work done is

KE of a body of mass 1 kg is 18 J. Its momentum is

A labourer pushes a wall and fails to displace it he does

When the speed of a moving object is doubled