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Can anyone list 10 advantages and disadvantages of friction?
What role does friction play in the sport of your choice? Collect some pictures of that sport in action where friction is either supporting it or opposing it. Display these pictures with proper captions on the bulletin board of your classroom
give 10 examples of friction in our daily life.
What are the methods of reducing friction? Explain .
why does rough surface have greater friction then smooth surface?
What are the problems faced by people living in desert areas?
Arrange in ascending order-
Rolling friction; Sliding friction; Static friction; Kinetic friction; Fluid friction
explain why sliding friction is less than static friction?
What role does friction play in the sport of your choice?
write various techniques adopted by human beings to reduce energy losses due to friction
Explain Friction as necessary evil?
can we reduce friction to zero by polishing surfaces or using large amount of lubricants?
friction a necessary evil
can u solve this riddle:
In some situations, I oppose the motion in other situation, I facilitate the motion but, i always oppose the relative motion between two moving surfaces. put some lubricant, and i become small there. Make the moving surfaces rough i make the movement tough. I may be- static, sliding or rolling but whenever two surfaces are in motion I am always there, Tell me who I am!!!!
IMAGINE THAT FRICTION SUDDENLY VANISHES. HOW WOULD LIFE BE AFFECTED. LIST TEN SUCH SITUATIONS
IS rolling friction more than sliding friction? true or false
give three examples of increase and decrease friction.
A coin of mass 20 g is pushed on a table. The coin starts moving at a speed of 25 cm/s and stops in 5 seconds. Find the force of friction exerted by the table on the coin.
WHAT ARE THE CHEMICALS PRESENT IN MATCHSTICK?
'When we walk, we press the ground in the backward direction, using our feet. Since friction acts in the opposite direction of motion, it pushes us forward. Hence, we are able to walk.'I dont understand this.. explain???
give example to show that friction is both a friend and a foe?
what is streamlining ??
Why is rolling friction less than sliding friction??
What are the differences between sliding and rolling friction ? ...(atleast 3)
Why do painter uses and paper in white washing the walls and in polishing doors?
Explain why the sole of our shoe wear out.
Under what conditions rolling friction increases? Maximum 6 points............
why is 'static friction'called a self adjusting force?
how 2 make webpages on pollution i jst need d HTML code plzz
how does friction helps us in walking?
Water comes out more slowly from upstairs tap than from a similar
Why soels of shoes and tyres of vehicles are treaded?
why spaceships are provided with heat shields
Give five examples to show that friction is increased deliberately.
explain why the handles of motor cyclenr covered with a rubber sheet with spikes????
what will happen if friction suddenly vanishes from our life
What is the difference between force and friction?
why is rolling friction less than sliding friction?
if you try to hold a glass with oil on your hands it tends to slip.why?
Why do we sprinkle fine powder on the carom board while playing?
a ball moving on a horizontal surface stops after sometime without applying any force.why
mention three effects (consequences) of friction.
is friction a friend or foe?
Friction arises due to the interlocking of depressions and__________present in a body.pls fill in the blank.
A car travels a certain distance with a speed of 50 km/hr and returns with a speed of 40 km/hr. Calculate the averagespeed for whole journey.
GIVE REASON WHY POWDER IS SPRINKLED ON THE CARROM BOARD
A weightlifter rubs powder in the hands before lifting a weight so as to increase the amount of friction in between the hands and the rod. This helps the lifter to have a better grip on the rod.
How can the amount of friction increase if powder is applied? Isnt it a lubricant?
why do we slip while stepping on a banana peel?
Why are the worn out tyres discarded?
why do painters use sand paper before painting the doors??
why do gymnasts apply a coarse substance to their hands
imagine thet friction suddenly vanishes,how would life be affected.list ten such situation
would you be able to suck juice with a drinking straw on the moon ?give reason?
on what principle do ball bearings work
Why is friction called a perverse force ?
name two solid lubricants and state where they are used
kabaddi players rub thier hands with the soil before the game starts
how does friction acts when we are writing with a chalk in blackboard?
why are grooves provided in the soles of shoes
Why does the sportsmen use shoes with spikes?
Give two examples where friction is (a) Useful (b) A nuisance.
what difference will you hear in a sound if there is an increase in
a)amplitude of vibration
b) frequency of vibration
Why friction is a necessary evil?
why are the bodies of birds streamlined
Use the following information to answer the next question.
A box is placed on three different surfaces − a marble floor, a cardboard sheet, and a sand paper. The minimum forces required to simply move the box on the surfaces are Fm, Fc, and Fs respectively.
The three forces can be arranged in the decreasing order as
Fc < Fm < Fs
Fc < Fs < Fm
Fm < Fc < Fs
Fs < Fc < Fm
(a) rollers are used for transporting luggage.
(b) metal chains are wrapped on tyres when they run on icy roads.
(c) aeroplanes and car bodies, are made more pointed along their fronts.
(d) talcum powder is put on a carrom-board before a game.
WHY DO WE SLIP ON A MUDDY ROAD AND WHEN WE STEP ON A BANANA PEEL?
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