Physics
Saifallan
2016-04-30 22:25:57
Which of the following is a contact force? A.Air resistance B.Magnetic force C.Gravity D.Electrical force
ANSWERS
stigofthedump
2016-05-01 01:06:15

The contact force is indeed caused by "Contact".  Air resistance is basically a type of friction, which is apparently present providing two object contact. The rest selections are all interaction force, which is not necessarily caused by contact.

mid
2016-05-01 01:07:30

Air resistance is a contact force as the air comes in direct contact with the object and pushes against it. Magnetic force - you can attract a magnet without touching it. Gravity, works on you when you are not in contact with the earth, pulling you down. Electrical force, between 2 electrons when not in contact.

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