MEDIUM
Earn 100

How does friction help in walking and running?

Important Questions on Force and Machine

EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Why are treads made in the surface of tyres?
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Explain why, wheels are so useful.
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Four similar cars having exactly the same mass are running at the same speed on the same road when brakes are applied at the same time. The cars come to a stop after covering distances of 5 m, 5.5 m, 4.8 m and 5.2 m respectively. The friction between the brake pads and discs will be the maximum in the car which travels the distance of:
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Car wheels often spin on icy roads. Explain why.
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Why do brake pads of bicycles have to be replaced quite often?
MEDIUM
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Explain why, a speedboat has a streamlined shape.
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Why are grooves provided in the soles of shoes?
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life

When objects move through fluids, they have to overcome friction acting on them by:

MEDIUM
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Which parts wear away first in shoes? Give a reason for your answer.
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
A body shape which offers very little resistance to the flow of air (or water) around it is called:
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Why does a matchstick light when we strike it on a rough surface?
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
State two advantages and two disadvantages of friction.
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
What is meant by 'streamlined shape'? Name an object which usually has a streamlined shape.
 
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
What is the name of 'special shape' which is given to objects moving through air (or water) to reduce drag?
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Which of the following does not have a streamlined shape?
MEDIUM
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Explain why, sportsmen use shoes with spikes.
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life

Friction can also produce?

EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Which of the following statement is not true?
EASY
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Which of the following is not an advantage of friction?
MEDIUM
Science>Physics>Force and Machine>Use of Frictional Force in Daily Life
Why are cars, aeroplanes and rockets streamlined?