वह विशिष्ट बिंदु जिससे होकर किसी पिण्ड का संपूर्ण भार कार्य करता है, चाहे उसकी स्थिति या अभिविन्यास कुछ भी हो, कहलाता है:

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: