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Alice and Bob are sat on a seesaw. The seesaw is in static equilibrium. Alice weighs 500N and is sat 0.5m to the left of the pivot. If Bob weighs 800N, how far from the pivot on the right is he sat? What happens if Bob moves closer to the pivot?

First of all draw a diagramIf the seesaw is in static equilibrium this means:There is no net force on the seesawThere is no net moment on the seesawAs a result the anti clockwise moments about the pivot e...

Answered by Lucas S. • Physics tutor

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Name the four fundamental forces.

Gravitational, electromagnetic, weak and strong.

Answered by Emily H. • Physics tutor

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What causes or reduces resistance in a material?

Resistance can be thought of as the amount of distruption to the flow of electrons. If we look at the equation for resitivity:R=kl/A,where k is the resistivity of the material (and is dependant on the mat...

Answered by Daniel G. • Physics tutor

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What is the law of energy conservation?

Energy cannot be created or destroyed, only transformed to different types of energy.

Answered by Rachel M. • Physics tutor

880 Views

Why is the refractive index of water bigger than that of air?

The refractive index is related to the perceived speed at which light is going in that medium. Water is more dense than air, ie there are more particles occupying a given space. So when light travels thro...

Answered by Miyabi B. • Physics tutor

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