set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

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)

Question : 2

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 : 3

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 : 4

A jet engine works on the principle of conservation of

a) energy

b) angular momentum

c) linear momentum

d) mass

Question : 5

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 no acceleration

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

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

Question : 6

The numerical ratio of average velocity to average speed is

a) always more than one

b) always equal to one

c) always less than one

d) equal to or less than one