Define contact and non contact force
Answers
Answer:
A non-contact force is a force which acts on an object without coming physically in contact with it. ... In contrast a contact force is a force applied to a body by another body that is in contact with it.
Explanation:
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Answer:
A non-contact force is a force which acts on an object without coming physically in contact with it. ... In contrast a contact force is a force applied to a body by another body that is in contact with it.
Explanation:
Coulombs law for electrostatic force between two pointcharges and Newtons law for gravitational force between two stationary point masses, both have inverse-square dependence on the distance between the charges/masses. Compare the strength of these forces by determining the ratio of their magnitudes for an electron and a proton.
The electric force between an electron and a proton at a distance r apart is:
F
e
=−
4πϵ
0
r
2
e
2
where the negative sign indicates that the force is attractive. The corresponding gravitational force (always attractive) is
F
G
=−G
r
2
m
p
m
e
where m
p
and m
e
are the masses of a proton and an electron respectively.
∣
F
G
F
e
∣=
4πϵ
0
Gm
p
m
e
e
2
=2.4×10
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