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What's the value of the normal force of a vehicle on a convex bridge? What about a concave one?

For a vechicle placed on a convex bridge: N=mg-F cf. For a vehicle placed on a concave bridge: N=mg+F cf. Where mg is the gravitational force and F cf is the centrifugal force.
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Answered by Dan M. • Physics tutor
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What is the difference between potential energy and potential?

Potential is the potential energy per unit at a certain location. For example in a electric field the electric potential energy depends on both the location of the charge in the field and the charge we are c...
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Answered by Edward T. • Physics tutor
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If a race car completed a full lap and is where he started, why is his average velocity zero but his average speed isn’t?

Velocity is displacement over time, whereas speed is distance over time. Displacement is the shortest distance from point A to point B(a straight line). In this case, the starting point(point A) is the endin...
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Answered by Osman O. • Physics tutor
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What is the difference between a scalar and a vector quantity?

A Scalar quantity has magnitude, but not direction. For example Speed is a scalar quantity.A Vector quantity has both direction and magnitude. For example Velocity is a vector quantity.
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Answered by Nathan G. • Physics tutor
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A simple pendulum is an example of a system in Simple Harmonic Motion, using conservation laws find a) the greatest speed of the bob and b) the magnitude of speed at a height of 1.0cm above the minimum point. Given it starts at rest, at a height of 20cm.

As this is an isolated system and a simple pendulum starting at rest, at maximum height, all the energy is in potential energy. The known equation for potential energy is simply mgh (mass x acceleration due ...
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Answered by Thomas S. • Physics tutor
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