एक झुके हुए तल (inclined plane) पर रखा एक ब्लॉक तब नीचे खिसकना शुरू करता है जब झुकाव कोण को धीरे-धीरे बढ़ाकर 30° कर दिया जाता है। ब्लॉक और तल के बीच स्थैतिक घर्षण गुणांक (coefficient of static friction) 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: