set 5 MCQ Questions & Answers Detailed Explanation

Question : 1

It is difficult to walk on the ice than on the road because

a) Ice does not offer any reaction when we push it with our foot

b) Road is harder than the ice

c) Ice is harder than the road

d) Ice has a lesser friction than the road

Question : 2

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

Question : 3

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 : 4

A car is moving on a road and rain is falling vertically. Select the correct answer.

a) The rain will strike both the screens

b) The rain will strike the front screen only

c) The rain will strike the wind screen only

d) The rain will not strike any of the screens

Question : 5

An electrical appliance of 500 W is used for 5 hours per day. Energy consumed in 30 days will be

a) 75 kW h

b) 25 kW h

c) 2.5 kW h

d) None of these

Question : 6

The potential energy of a freely falling object decreases progressively.

a) Sum of Potential Energy and Kinetic Energy at any point during the free fall remains constant

b) Potential energy gets converted into kinetic energy progressively

c) The law of conservation of energy is violated

d) Both (a) and (b)