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

(a) force of gravity
(b) force of friction
(c) magnetic force
(d) electrostatic force

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Solution

(b) force of friction

Friction is always present when two bodies are in contact and it is absent when they are not in contact.

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

(a) force of gravity
(b) force of friction
(c) magnetic force
(d) electrostatic force

Which of the following is a contact force:
(a) electrostatic force (b) gravitational force
(c) Frictional force (d) magnetic force.

Q. Question 5
Two objects repel each other. This repulsion could be due to

(a) frictional force only
(b) electrostatic force only
(c) magnetic force only
(d) either a magnetic or an electrostatic force

Which of the following is not a no-contact force ?
(a) electrostatic force (b) gravitational force (c) frictional force (d) magnetic force

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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Contact Forces

Standard IX Physics

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Question 6 Which one of the following forces is a contact force? (a) force of gravity (b) force of friction (c) magnetic force (d) electrostatic force

(b) force of friction Friction is always present when two bodies are in contact and it is absent when they are not in contact.

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

(a) force of gravity
(b) force of friction
(c) magnetic force
(d) electrostatic force

(b) force of friction

Friction is always present when two bodies are in contact and it is absent when they are not in contact.