what are the two advantages and disadvantages of friction?
610398
['It always resists the motion, so extra energy is required to overcome it.', 'It causes wear and tear of machines.', 'It decreases the life expectancy of moving parts of vehicles.', 'Since friction is very useful in some cases while harmful in some cases, friction is called a necessary evil.']
677691
['Friction is responsible for many types of motion.', 'It helps us walk on the ground.', 'Brakes in a car make use of friction to stop the car.', 'Asteroids are burnt in the atmosphere before reaching Earth due to friction.', 'It helps in the generation of heat when we rub our hands.']
923331
['friction between our shoes and the floor stop us from slipping.', 'friction between tyres and the road stop cars from skidding.', 'friction between the brakes and wheel help bikes and cars slow down.']
425957
Friction force always acts opposite direction of motion of the body. Good effects--- (i) Friction between our shoes and the floor stop us from slipping. (ii) Friction between tyres and the road stop cars from skidding. ... (iii) Friction with air causes air craft, rockets to heat up.
644823
Friction can be useful. For example, friction between our shoes and the floor stop us from slipping and friction between tyres and the road stop cars from skidding.
911782
Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces.
228810
Sometimes we want to reduce friction. For example, we use oil to reduce the friction between the moving parts inside a car engine. The oil holds the surfaces apart and can flow between them. The reduced friction means there is less wear on the car's moving parts and less heat produced.
549018
Friction is a force that resists the relative motion between two objects or materials. The causes of this resistive force are molecular adhesion, surface roughness, and deformations. ... But surface roughness is a factor when the materials are rough enough to cause serious abrasion. This is called the sandpaper effect.
441792
Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.
927896
['parts of machines wear out due to friction.', 'soles of shoes and slippers wear out due to it.', 'sometimes noise is produced due to it.', '4.it causes heat and energy loss due to it.']
108931
What is the difference between Rolling Friction and Sliding Friction? Rolling friction takes place when an object rolls on the surface. Sliding friction takes place when two surfaces are rubbed against each other. Rolling friction takes place due to deformation of surfaces.
1150599
In some cases, friction is desirable while in other cases, friction reduces the effectiveness of machines. Without friction, you would not be able to walk, the wheels on a vehicle would have no grip on a road surfacing and the vehicle would not be able to move forward.
1460433
Lubrication reduces the heat generated when two surfaces are in motion. It smoothes the process by forming a film between two surfaces that reduces friction and thus improves performance and efficiency. There are different variety of lubricants and oils available such as Engine Oil, Hydraulic Oil, and Greases.
994271
Static, sliding, and rolling friction occur between solid surfaces. Static friction is strongest, followed by sliding friction, and then rolling friction, which is weakest. Fluid friction occurs in fluids, which are liquids or gases.
946361
['It is becomes difficult to walk on a slippery road due to low friction. ... ', 'We can not fix nail in the wood or wall if there is no friction.']
872805
['Disadvantage: Weight. ... ', 'Disadvantage: Maneuverability. ... ', 'Disadvantage: Breathability and Vision. ... ', 'Disdvantage: Heat. ... ', 'Advantage: Protection. ... ', 'Advantage: Identification.']
1187708
Hey friction is not an energy. Basically it is the medium to convert kinetic energy into thermal energy which get stores in a body.. ... Friction is a phenomenon that opposes relative motion between two surfaces in contact. Frictional force is a type of force.