set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Statement A :
While drawing a line on a paper, friction force acts on paper in the same direction along which line is drawn on the paper.
Statement B :
Friction always opposes motion.

a) Both statements are correct.

b) Statement B is correct.

c) Statement A is correct.

d) Both statements are incorrect.

Question : 2

A person sitting on a chair in a satellite feels weightless because

a) the normal force is zero

b) the normal force by the chair on the person balances the earth’s attraction

c) the earth does not attract the objects in a satellite

d) the person in satellite is not accelerated

Question : 3

Two teams are pulling a rope with equal and opposite forces each of 5 kN in a tug of war so that a condition of equilibrium exists. What will be the tensile force in the rope?

a) 5 kN

b) 2.5 kN

c) Zero

d) 10 kN

Question : 4

A spherical body moves with a uniform angular velocity (w) around a circular path of radius r. Which one of the following statements is correct?

a) The body has a radial acceleration 2/5$ω^2$r directed away from the centre of the path

b) The body has a radial acceleration $ω^2$r directed toward centre of path

c) The body has no acceleration

d) The body has an acceleration $ω^2$ tangential to its path

Question : 5

A couple is acting on a two particle systems. The resultant motion will be

a) both a and b

b) purely linear motion

c) purely rotational motion

d) neither of a and b

Question : 6

The variation of displacement d with time t in the case of a particle falling freely under gravity from rest is correctly shown in graph:

a)

b)

c)

d)