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Physics
A Level

What is Newton's Third Law and what is an example of it?

Newton's Third Law looks at what happens when two objects interact with each other. The definition of Newton's Third Law is, "When one body exerts a force on a second body, the second body simultaneo...

Answered by Maxwell O. Physics tutor
4824 Views

A uniform plank of wood of mass 32 kg and length 4.0 m is used to cross a ditch. In the ditch is a rock, which is used to support the plank horizontally 0.80 m from one end. The other end is supported by the bank. Calculate the rock's supporting force.

We need to calculate moments about a point through which one of the forces is acting. I choose the bank support point. At this point, 

moments are caused by the weight of the plank acting at its ce...

Answered by Ricardo S. Physics tutor
11109 Views

What conditions are required for simple harmonic motion?

Acceleration is directly proportional to the displacement from the position of equilibrium. Also the resultant force is therefore also directly proportional to this displacement, and the resultant force a...

Answered by William C. Physics tutor
34633 Views

Is light the fastest? if no, then explain quantum entanglement!

No, light is not the fastest travelling thing in this universe and quantum entanglement fully supports my openion. It is interesting to note that every light sorce converges to a point source as we move a...

Answered by Prashant .. Physics tutor
1837 Views

How can you tell if a reaction will happen?

This will depend on the conservation laws. In the same way that a numerical equation must be equal on either side, a reaction must have the same amount of certain properties on each side. The properties t...

Answered by Chloe E. Physics tutor
2146 Views

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