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Jiptesh answered 1 year(s) , 8 month(s) ago

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  ...

Jun 4

• 60 Likes
• 201655 Views

Jun 4

Rajendra answered 4 year(s) , 4 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

Dec 20

• 2 Likes
• 43860 Views

Dec 20

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...

Apr 8

• 9 Likes
• 43696 Views

Apr 8

Amarnathreddy answered 5 year(s) , 8 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...

Sep 27

• 3 Likes
• 37516 Views

Sep 27

what is the difference between natural and artificial magnet ?

THE MAIN DIFFERENCE IS

one is NATURAL and the other is ARTIFICIAL :p

Jan 24

• 2 Likes
• 32530 Views

Jan 24

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...

Jun 21

• 5 Likes
• 32008 Views

Jun 21

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...

Oct 22

• 6 Likes
• 31146 Views

Oct 22

Aman answered 4 year(s) , 3 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...

Feb 18

• 2 Likes
• 30369 Views

Feb 18

Sara Batool answered 3 year(s) ago

Sep 28

• 5 Likes
• 30210 Views

Sep 28

Sidda commented 1 year(s) , 3 month(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...

Mar 9

• 2 Likes
• 25010 Views

Mar 9

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...

Apr 9

• 3 Likes
• 22761 Views

Apr 9

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...

Jun 24

• 2 Likes
• 22433 Views

Jun 24

Amarnathreddy answered 4 year(s) , 11 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...

Jul 9

• 7 Likes
• 22400 Views

Jul 9

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...........

Nov 14

• 0 Like
• 17827 Views

Nov 14

Himanshu answered 3 year(s) , 10 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...

Jul 20

• 1 Like
• 17372 Views

Jul 20

What is the importance of the Pole Star ?

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...

Jul 9

• 0 Like
• 16308 Views

Jul 9

Ayush kumar commented 4 year(s) , 8 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.

Sep 12

• 4 Likes
• 15843 Views

Sep 12

Amarnathreddy answered 3 year(s) , 10 month(s) ago

Give two examples showing the harmful effects of friction.

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

Jul 9

• 1 Like
• 14570 Views

Jul 9

Janhavi answered 4 year(s) , 5 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...

Dec 14

• 1 Like
• 14079 Views

Dec 14

Gaurav answered 5 year(s) , 3 month(s) ago

what are the applications of multiple reflection by plain mirror?

If a reflected light ray is reflected again on being incident on another surface, it is termed multiple reflections. Multiple reflections are used in periscopes. Periscopes are used in subm...

Mar 10

• 4 Likes
• 13561 Views

Mar 10

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