The co-efficient of friction depends upon_______________?

Question: A body is said to move or vibrate with simple harmonic motion if its acceleration is directed towards the mean position.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is
[A].

reversible

[B].

non-reversible

[C].

ideal

Answer: Option A

Explanation:

No answer description available for this question.

Question: A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act
[A].

towards the wall at its upper and

[B].

away from the wall at its upper end

[C].

downward at its upper end

[D].

upward at its upper end

Answer: Option D

Explanation:

No answer description available for this question.

Question: The angle which the normal reaction makes with the resultant reaction is called angle of friction.
[A].

Agree

[B].

Disagree

Answer: Option A

Explanation:

No answer description available for this question.