set 5 MCQ Questions & Answers Detailed Explanation

Question : 1

The work done becomes zero if

a) force acting on the body is zero

b) displacement is zero

c) force perpendicular to the displacement

d) All of the above

Question : 2

Match the Column I and Column II.

a) A-Q; B-P; C-T; D-S; E-R

b) A-Q; B-P; C-T; D-T; E-S

c) A-P; B-Q; C-T; D-R; E-S

d) A-Q; B-P; C-T; D-R; E-S

Question : 3

SI unit of pressure is

a) pascal

b) bar

c) atmosphere

d) mm of Hg

Question : 4

In cricket match, while catching a fast moving ball, a fielder in the ground gradually pulls his hands backwards with the moving ball to reduce the velocity to zero. The act represents

a) Newton’s third law of motion

b) Newton’s second law of motion

c) Newton’s first law of motion

d) Law of conservation of energy

Question : 5

Which one of the following physical quantities is represented by the shaded area in the given graph?

a) Power

b) Impulse

c) Torque

d) Work done

Question : 6

A gymnast takes turns with her arms and legs stretched. When she pulls her arms and legs

a) the angular velocity stays constant

b) the moment of inertia decreases

c) the angular velocity decreases

d) the angular momentum increases