Q.

Gravitational force


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a

is a 'non-contact’ force

b

can act only if a body is charged

c

opposes the motion of a body, just like friction

d

is zero on the Moon 

answer is A.

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Detailed Solution

Gravitational force is a ‘non-contact’ force.
Gravitational force is the kind of force that pulls objects in a downward direction. This is a small force, and we can feel it on massive objects. This force does not need any contact to come into action and is known as a non-contact force. There are two types of forces.
a)      Contact force
b)     Non-contact force
Contact forces are those forces in which surfaces are in physical touch with each other. And in non-contact forces, there is no physical contact between the objects.
 
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