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Walking would not be impossible, but it would be likened to trying to walk on ice. Friction opposes movement, which can also be translated into traction. The more friction, the more of an opposing force the object will feel. Since ice has no friction, slipping and sliding is a problem to deal with. But since the majority of ground material on Earth has some type of friction, the opposing force that it provides also allows the feet to remain firmly planted on the ground rather than slipping out from underneath.
What else can I help you with?
What are at least 3 situations that it would be more practical to use a wheel and axle rather than a lever?
Using a lever and using Wheel and axle is completely different.Some Practical situations could be :When you want to move a heavy box and you are using a lever to roll it to make it move,You can rather use a wheel and axle.The thing is that where wheel and axle is used at that place lever cannot be used and vice versa.You cannot use a wheel and axle to open cars door hence lever is used.You cannot use lever to move a car there fore you need wheel and axle.
Does friction cause the average speed of a marble on a floor to decrease?
Yes, because of rolling friction which is a type of friction that any rolling object experiences. This friction adds resistance to roll which will slow the marble and eventually stop.
Do bigger wheel roll faster?
No. Bigger wheels roll slower than smaller wheels. They roll slower because they have a larger circumference and they take longer to roll. Smaller wheels have a smaller circumference meaning they go faster.
How can you use a roller skate a sidewalk and watermto demonstrate how rollind friction works?
If you push a rollerskate down the sidewalk and don't keep pushing it, rolling friction will eventually cause it to stop on its own (assuming that the sidewalk is level and not on a hill)
How are fan blades inclined planehow is a toilet paper dispencer a wheel and axel?
I can't quite understand the first part of your question. For the second part of your question: Toilet roll dispensers vary, but a simple variant would involve a bar, which is fixed (like an axle), surrounded by the toilet roll, which rotates (like a wheel).
How is wheel useful?
You couldn't roll without them.
How is the wheel helpful?
You can't roll without them.
Prove that friction is a necessary evil?
Yes necessary evil. If friction is totally absent then no wheel could roll on the road. No chance of walking on the floor. We cannot hold even the pen. Same time too much of friction would bring a terrible loss of energy.
What happens if there were no friction?
Without friction, objects would have no resistance, therefor loose no energy as a result. For example, without friction a ball could roll up and down a half-pipe continusily without loosing hight.
What is useful friction?
there is friction in your cars brake system and without that frictiuon there your car would roll away whenever it was on a hill so this is a good example of when friction is useful.
What type of simple machine is a wagon wheel?
A wagon wheel is a type of wheel and axle simple machine. It allows for easier movement of heavy loads by reducing friction and enabling the wagon to roll more smoothly.
Does a ball need friction to roll?
sure a ball needs friction to roll. the logic behind this being, that the friction which generally retards a body's motion plays differently in this case, it acts tangentially in backward direction at the point of its contact with the rolling surface, so in this way , it generates a rolling motion
What is rolle?
Roll in the clover/hay. To roll joints, smoke and roll on one's back /sides/ front while laying on a couch/bed. Anything rolling from one place to another. To move/roll from one place to another.
Two identical freight cars roll without friction towards each other on a level track?
The probability of them crashing is 1.
Why is rolling friction a type of static friction even though static means not moving?
It's static because the major cause of rolling friction is deformation of both roll and surface it's moving on - surfaces do not slide on each other(at any given instant the relative velocity of point on the roll that touches surface and surface itself is zero - at least in the model). The deformation causes the point of contact to be slightly displaced in front of the moving roll and reaction force at this point plus weight of the rolling object are no longer on the same line. This introduces torque that opposes the rotation of the roll. Rolling friction is essentially static friction because the point of the wheel in contact with the ground does not slide against it, but instead maintains its position. If enough static friction does not exist and the wheel slips against the ground, motion will not be proper. Sliding friction will however be taken into account in that case.
Why do ball if you roll it will stop?
because of the friction.
Are gears an example of rolling friction?
Gears are not perfect example for rolling friction. Most energy lost in gear operation is due to the surface shear stress, which is more like sliding friction. Rolling friction is due to the pressure induced torque applied on the roll axis. Under this circumstance, the equivalent pressure force doesn't point to the roll axis, which creates a torque to resist the rolling motion. A good example for rolling friction can be a running wheel of the car.
