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3 years ago

List one example of contact and non contact force

Physics

1 answer:

Savatey [412]3 years ago

5 0

Answer Contact Force =Muscular force ,frictional force ,spring force, normal force, tension force are few examples.

Non-Contact Force= Gravitational force ,electrostatic force, magnetic force and electrochemical force are few examples

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3 years ago

Suppose a star has the same apparent brightness as Alpha Centauri A ( 2.7×10−8watt/m2 ) but is located at a distance of 300 ligh

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<h3> What is its luminosity?</h3>

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2 years ago

Show all work.

lys-0071 [83]

The new gravitation force at the new location is 40 N

Explanation:

The weight of the astronaut is given by the equation

$F=mg$ (1)

where

m is the mass of the astronaut

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$g=\frac{GM}{r^2}$

where G is the gravitational constant and M is the Earth's mass. So we can rewrite eq.(1) as

$F=\frac{GMm}{r^2}$

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$F=\frac{GMm}{R^2}=640 N$

Later, he moves to another location where his distance from the Earth's surface is 3 times the previous distance, so the new distance from the Earth's centre is

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