Recent content by BERNIE649

The arm is like a coiled spring. As the spring extends it applies a force F to the body for a distance d and a time t. W= F x t. Impulse J = F x t. The wall does nothing.

Thank you mfb.

A stereo microscope may not be the best tool for inspecting a narrow trench. I suggest a compound microscope with the illumination through the lens. You don't mention the dimensions, but in my experience with deep features in the micrometer or tens of micrometers range, the compound microscope...

Thank you Cauchyam and Gordianus for your help. I still have some questions. In the problem in question supposing the mass continues swinging around with no friction. If I want to calculate its energy, is it correct to apply the rotational kinetic energy formula, and would also be valid to...

This is problem from a textbook whose solution I don't understand. A small rock of mass 0.5kg is attached to a 1.5m string, then it is whirled for 5 seconds until it achieves a near horizontal orbit at 120 rpm. What is the torque required? I used the equation : τ=Iα (moment of inertia x...