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What is the importance of the resultant force in a free-fall question?

The resultant force is firstly a key-word that any examiner will notice and so it will benefit your chance of getting the marks straight away. It helps us describe whether the forces are balanced or whether ...
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Answered by Laura C. • Physics tutor
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How would you calculate the moment of a Force on a rigid object?

You would calculate the moment of a force on a object by first finding the distance of the force from the pivot point of the object. Following this, you would find the component of the force perpendicular to...
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Answered by Nathan S. • Physics tutor
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A linear accelerator (LINAC) is used to accelerate protons at CERN before they are injected into the Large Hadron Collider. Explain with the aid of a diagram how the proton is accelerated by the LINAC.

A linear accelerator is built with several drift tubes that increase in length, at either end of each tube are electrodes that provide an alternating current. As a proton is a positively charged particle it ...
EB
Answered by Emma B. • Physics tutor
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Explaining how capacitors work

Capacitors work through the build up of current on their two opposing plates. Current in the form of negatively charged electrons builds up on one plate which in turn repels electrons on the other plate maki...
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Answered by Ryan M. • Physics tutor
3336 Views

What is the escape velocity of an object leaving a planet mass M, radius R?

As the object leaves the surface of the planet, it loses kinetic energy and gains gravitational potential energy. Through conservation of energy we know the loss of kinetic energy must be equal to the gain o...
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Answered by Thomas R. • Physics tutor
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