A 100 g sphere moving at a speed of 20 m/s collides with another sphere of mass 50 g. If the second sphere was at rest prior to the collision and the first sphere comes to rest immediately after the collision, considering the collision to be perfectly elastic, what would be the speed of the second sphere?

Which of the following forces is/are responsible for the sedimentation of particles during centrifugation?

Which of the following forces always opposes the applied motion or force?

Statement: An object of mass M falls freely under gravity, maintaining a constant acceleration. Conclusion I: The velocity of the object increases uniformly with time. Conclusion II: The acceleration of the object depends on its mass. Choose the correct option: