Questions :-

1. Which of the following surface have greater friction?
(a) Smooth surface
(b) Rough surface
(c) Curved surface
(d) None of these

2. Friction is reduced by __________
(a) Ball bearings
(b) Glass
(c) Both of these
(d) None of these

3. Friction force depends upon ____________ of the fluid.
(a) Shape
(b) Size
(c) Shape and size both
(d) None of these

4. Friction is a/an __________
(a) Evil
(b) Foe
(c) Evil and foe both
(d) None of these

5. On what force friction depends?
(a) Smoothness of surface
(b) Roughness of surface
(c) Roughness of surface
(d) All of the above

6. Shape of the aeroplane is looks like ___________
(a) Bird
(b) Car
(c) Boat
(d) None of these

7. The sole of the shoes and the tyres of the vehicle are treaded to __________ friction.
(a) Increase
(b) Decrease
(c) Remove
(d) None of these

8. Name the device used for measuring the force acting on an object.
(a) Strain Balance
(b) Spring Balance
(c) Stress Balance
(d) None of these

9. Stretching of the spring is measured by _________, moving on a graduated scale.
(a) Pointer
(b) Injecter
(c) Projector
(d) None of these

10. The force required to overcome friction at the instant an object starts moving from rest is a measure of __________
(a) Rolling friction
(b) Sliding friction
(c) Drag
(d) Static friction