rotational-motion

Related Questions

• The angular speed of a fly–wheel making 120 revolution/minute is

  ---

• A smooth sphere A is moving on a frictionless horizontal plane with angular speed $\omega $ and center of mass with velocity $v$. It collides elastically and head-on with an identical sphere B at rest. Neglect friction everywhere. After the collision, their angular speeds are ${{\omega }_{A}}$ and ${{\omega }_{B}}$ respectively. Then

  ---

• A ring takes time ${{t}_{1}}$ in slipping down an inclined plane of length L and takes time ${{t}_{2}}$ in rolling down the same plane. The ratio $\frac{{{t}_{1}}}{{{t}_{2}}}$ is

  ---

• Two particles of masses 1 kg and 3 kg move towards each other under their mutual force of attraction. No other force acts on them. When the relative velocity of approach of the two particles is 2m/s, their centre of mass has a velocity of 0.5 m/s. When the relative velocity of approach becomes 3 m/s, the velocity of the centre of mass is

  ---

• Four identical spheres each of mass m are placed at the corners of square of side 2 metre. Taking the point of intersection of the diagonals as the origin, the co-ordinates of the centre of mass are

  ---