निम्नलिखित में से कौन सा सरल यांत्रिक उपकरण न्यूनतम प्रयास के साथ बल को कुशलतापूर्वक गुणा करता है या भार को पुनर्वितरित करता 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: