Looking at your FBD above, which forces, if any, do work that is not a part of the potential energy of the system? If there are none, then energy is conserved. Write down the individual contributions ...

A cable connects block B to point A on the interior of the disk. We want to know the angular acceleration of the disk on release from rest. Watch the animation of the motion of the disk. What do you ...

But these are no ordinary equations, as the three that are pre-answered are blatantly incorrect based on the laws of addition you most likely learned in elementary school. So the key to solving ...

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To balance an unbalanced equation, you need to add numbers to the left of one or more formulae. Here is one way to work out how to do this for the reaction between nitrogen and hydrogen.

The world is moving fast but did you ever wonder how to measure the energy of a moving object? To accelerate an object requires the application of force. And the application of force is, quite ...

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