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Non-contact Forces

The non conta...

Question

The non contact force is :
(a) force of reaction (b) force due to gravity
(c) tension in string (d) force of friction

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Solution

Answer: (b) force due to gravity
The forces which act on bodies when they are in physical contact. are called contact forces. For e.g. frictional force and force exerted on two bodies during a collision.
The forces experienced by bodies even without being physically touched are called the non-contact forces. For e.g. Gravitational force and Electrostatic force.

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Classify the following amongst contact and non-contact forces:
(a) frictional force,
(b) Normal reaction
(c) force of tension in a string,
(d) gravitational force,
(e) electrostatic force,
(f) magnetic force.

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i) frictional force,

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Q. Question 6
Which one of the following forces is a contact force?

(a) force of gravity
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Q. A lead block is suspended from your hand by a string. The reaction due to the force of gravity on the block is the force exerted by :

(a) Define frictional force (or friction)

(b) Explain why frictional force is said to be a contact force.

(c) Explain why magnetic force is said to be a non-contact force.

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Non-contact Forces

Standard IX Physics

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