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Question & Answer Forum

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Jiptesh answered 1 year(s) , 2 month(s) ago

what are the advantage and disadvantage of friction?

ADVANTAGES OF FRICTION Friction plays a vital role in our daily life. Without friction we are handicap. 1. It is becomes difficult to walk on a slippery road due to low friction. When we move on ice, it  ...

Asked by Smitha

Jun 4

  • 7 Answers
  • 41 Likes
  • 161143 Views
Syeda answered 1 year(s) , 5 month(s) ago

Give examples to show that friction is both a friend and a foe.

Friction can be both friend and foe.
FRIEND:
1 It helps in construction of buildings.
2 It helps in walking on the ground.
FOE:
1 soles of shoe and tyres of vehicles wear...

  • 8 Answers
  • 8 Likes
  • 38878 Views
Rajendra answered 3 year(s) , 9 month(s) ago

In which medium sound travels more faster

sound travels faster in glass than of water and air because sound travel faster in solid than of liquids and gases and vaccum is an empty space through which sound cannot travel through

  • 6 Answers
  • 2 Likes
  • 37469 Views
Sara Batool answered 3 year(s) , 6 month(s) ago

How to prepare for NASA Astronomy olympiad (NAO)? Any related websites or coaching ? Please help

Visit NASA website or try downloading NASA app

Asked by Gautami

Sep 28

  • 9 Answers
  • 4 Likes
  • 28436 Views
Syeda answered 1 year(s) , 5 month(s) ago

what is the difference between natural and artificial magnet ?

THE MAIN DIFFERENCE IS

one is NATURAL and the other is ARTIFICIAL :p

Asked by Subarna

Jan 24

  • 5 Answers
  • 2 Likes
  • 27799 Views
Syeda answered 1 year(s) , 5 month(s) ago

why school bags have wide straps?

we know that there is application of pressure that is
if the contct area is more than pressure is less
if contact area is less than prrrssure is more
if the area of the bag straps is les...

Asked by Sumana

Jun 21

  • 10 Answers
  • 5 Likes
  • 27551 Views
Syeda answered 1 year(s) , 5 month(s) ago

Why do women have shriller voices than men ?

Why do women have shriller voices than men?  
Answer:  The shrillness of a sound depends upon its frequency and pitch, the higher the pitch the shriller the sound. 
 
As t...

Asked by Vishal

Oct 22

  • 13 Answers
  • 6 Likes
  • 24861 Views
Amarnathreddy answered 5 year(s) , 2 month(s) ago

A pendulum makes 40 oscillations in 4 seconds. find its time period and frequency.

time period of the pendulum is the time taken for one oscillation.    
time period= time taken for no. of oscillations/ no. of oscillations.
here no. of oscillations= 40,  and time taken= 4secon...

Asked by Ghanashyam

Sep 27

  • 2 Answers
  • 2 Likes
  • 23909 Views
Syeda answered 1 year(s) , 5 month(s) ago

RUBBER SUCKER

As the sucker sticks to the smooth surface the air in it goes outside and a partial vacuum is formed in it as the atmospheric pressure acts on it from the outside it is difficult to remove it after sticking to...

Asked by Heba

Jun 24

  • 5 Answers
  • 2 Likes
  • 19716 Views
Sidda commented 9 month(s) , 10 day(s) ago

Explain, why rolling friction is less than sliding friction?

Rolling friction is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface. Sliding friction is the force resisting the motion when a body slides on a surface. The force...

Asked by Ratnadeep

Mar 9

  • 3 Answers
  • 2 Likes
  • 19669 Views
Syeda answered 1 year(s) , 5 month(s) ago

Why is it difficult to hold a school bag having a strap made of thin and strong string?

Why is it difficult to hold a school bag having a strap made of thin and strong string?
 
Answer:  It is difficult to hold a school bag having a strap made of...

  • 8 Answers
  • 3 Likes
  • 19503 Views
Amarnathreddy answered 4 year(s) , 4 month(s) ago

Cutting edge of a knife made sharp. Why?

Why does the cutting edge of a knife made sharp?
 
Answer:  The cutting edges of tools like blades, knives etc., are provided with sharp edges to cut the thing...

Asked by Shreenidhi

Jul 9

  • 1 Answer
  • 7 Likes
  • 19195 Views
Aman answered 3 year(s) , 9 month(s) ago

What is the difference between gravity and gravitational force ?

Actually,
              Gravity is a force that attracts any body towards centre of the earth.
              Gravitational force is exerted by one object oer another.

The differe...

  • 3 Answers
  • 0 Like
  • 18823 Views
Syeda answered 1 year(s) , 5 month(s) ago

why is it difficult to walk on a smooth or wet floor

it is difficult to walk on smooth and wet floor because the friction is less and the required grip is not available so, sometimes we slip on wet floor...........

Asked by Punmaram

Nov 14

  • 7 Answers
  • 0 Like
  • 15692 Views
Ayush kumar commented 4 year(s) , 2 month(s) ago

Why are dams broader at the base than at the top?

Dams are made broader at the base than at the top to withstand the pressure of the water behind it. As the pressure is greatest at the bottom, the dam must be made thickest at its base. 

Asked by Shrinkhla

Sep 12

  • 4 Answers
  • 4 Likes
  • 14526 Views
Himanshu answered 3 year(s) , 4 month(s) ago

why the shape of an aeeroplane or a ship is streamlined?

Best Answer:    Airplanes are streamlined so that they experience less friction with the air around them as they fly. Friction slows the airplane down and causes it to consume more fuel, so reducing friction is...

Asked by Arunabha

Jul 20

  • 3 Answers
  • 1 Like
  • 14465 Views
Syeda answered 1 year(s) , 5 month(s) ago

What is the importance of the Pole Star ?

Answer.

The Pole Star, or Polaris, is directly above Earth's North Pole. From our perspective on Earth, every star in the sky pivots around the Pole Star, causing them to rise and set. Because of...

Asked by Shreya

Jul 9

  • 2 Answers
  • 0 Like
  • 13948 Views
Amarnathreddy answered 3 year(s) , 4 month(s) ago

Mention three simple methods of reducing friction.

not three but two of them are-
use a lubricating material
make the two surfaces smooth in order to reduse friction

Asked by Sanjeev

Jul 9

  • 2 Answers
  • 1 Like
  • 11975 Views
Janhavi answered 3 year(s) , 11 month(s) ago

Why do heavy vehicles have broad tyres?

Heavy vehicles have broad tyres because broad tyres have large area of contact and less pressure on the ground.  Because of this, heavy vehicles (like tractor) can move even on soft roads and fields without sin...

Asked by Rakshit

Dec 14

  • 1 Answer
  • 1 Like
  • 11756 Views
Amarnathreddy answered 3 year(s) , 4 month(s) ago

Give two examples showing the harmful effects of friction.

Disadvantages of Friction
       •  Friction causes moving objects to stop or slow down.
       •  Friction produces heat causing wastage of energy in machines.
       •...

Asked by Sanjeev

Jul 9

  • 1 Answer
  • 1 Like
  • 11132 Views
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