are called non-contact forces.
7) The weight of a body can be measured by using a physical balance.
) Concave mirror is used as a rear view mirror of a car
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Forces that act on an object without coming physically in contact with it are non-contact forces. Example: gravitational force, magnetic force, and electrostatic force.
No, the weight of a body can't be measured by using a physical balance. Physical balance is a tool used to measure the weight of objects, not human beings. But yes, if it is a very big one.
False, a convex mirror is used as a rearview mirror of a car as it gives a wider image of the area.
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