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Why should the friction in the pulley the mass of the string and the rotational inertia of the pulley be all small?
Wiki User
∙ 10y ago
Because then you don't have to include those things in your equation when you're working out the answer.
Wiki User
∙ 10y ago
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A 2.8kg 40cm diameter disk is spinning at 260 rpm How much friction force must the brake apply to the rim to bring the disk to halt in 2.0s The answer should be in Newtons?
Torque is equal to friction force (F) * radius (r). Torque is also equal to moment of inertia (I) * Angular acceleration (a). Angular acceleration is equal to rotational velocity * 2Pi/time, which is 2 seconds. So, F = IRa/r, or 45.63 Newtons
Static friction is the friction force that must be overcome to keep an object moving at a constant speed?
Static Friction. "Just as the second law regarding friction states that surface area does not determine friction (but rather, weight determines surface area), the third law holds that friction is independent of the speed at which an object is moving along a surface-provided that speed is not zero. The reason for this provision is that an object with no speed (that is, one standing perfectly still) is subject to the most powerful form of friction, static friction. The latter is the friction that an object at rest must overcome to be set in motion; however, this should not be confused with inertia, which is relatively easy to overcome through the use of force. Inertia, in fact, is far less complicated than static friction, involving only mass rather than weight. Nor is inertia affected by the composition of the materials touching one another."
To stop friction what must be used?
Lubrication stops friction. If you put lubricant on a surface, there should be no friction
Should one add static friction and kinetic friction together to find the total friction force?
No. You use whichever applies: if an object is at rest, you use static friction. If it is moving, you use kinetic friction.
Should friction be reduced if possible?
no not really
Do heavier objects roll down a hill faster than lighter ones?
Rolling is more complicated than falling, because rotational inertia is involved. Without that factor, in an ideal world this is the same as asking if a heavier object falls faster than a lighter one. The answer to that question (again, in an ideal world) is no. In the real world... it might, or it might not, it depends on the exact circumstances. There's no fundamental reason that it should if the objects have similar construction (i.e. moments of rotational inertia), but friction and wind resistance complicate things.
A 2.8kg 40cm diameter disk is spinning at 260 rpm How much friction force must the brake apply to the rim to bring the disk to halt in 2.0s The answer should be in Newtons?
Torque is equal to friction force (F) * radius (r). Torque is also equal to moment of inertia (I) * Angular acceleration (a). Angular acceleration is equal to rotational velocity * 2Pi/time, which is 2 seconds. So, F = IRa/r, or 45.63 Newtons
Static friction is the friction force that must be overcome to keep an object moving at a constant speed?
Static Friction. "Just as the second law regarding friction states that surface area does not determine friction (but rather, weight determines surface area), the third law holds that friction is independent of the speed at which an object is moving along a surface-provided that speed is not zero. The reason for this provision is that an object with no speed (that is, one standing perfectly still) is subject to the most powerful form of friction, static friction. The latter is the friction that an object at rest must overcome to be set in motion; however, this should not be confused with inertia, which is relatively easy to overcome through the use of force. Inertia, in fact, is far less complicated than static friction, involving only mass rather than weight. Nor is inertia affected by the composition of the materials touching one another."
What is the path for the serpentine belt on the 01 Taurus?
should be a sticker on fan shroud Alternator, idler pulley, power steering, a/c, tensioner pulley, crankshaft pulley, water pump this is the order cant upload the picture but when placing the belt on if the pulley has the grooves in it the grooved side of the belt should face the pulley and if the pulley is smooth then the back of the belt faces the pulley
To stop friction what must be used?
Lubrication stops friction. If you put lubricant on a surface, there should be no friction
How do you align the timing marks for a 2.2 liter Toyota engine?
Timing mark on the crankshaft pulley (mark should be at zero) must be aligned with the mark on the camshaft pulley (mark should be in the middle of the hole in the pulley).
You like cheese with do you know the inertia of fart bubbles?
I feel that if you are looking for the inertia of when you eat the cheese and produce a fart bubble, the inertia should be around 3.14 or Pi. Wouldn't you agree?
How do you remove the idler pulley for a 3.8 liter?
Should only be one bolt in the middle of the pulley that releases it.
Where is the water pump on a 1996 ford probe se?
Should be the pulley just above the crankshaft pulley
Where is the water pump located on a Ford Expedition XLT?
The water pump pulley is the pulley right above the crank pulley (the big pulley in the bottom of the engine.) Right above the water pump pulley should be the alternator pulley, which drives the alternator. I'm guessing the water pump is behind the WP pulley. == == == ==
How do you replace a tension pulley on a dodge truck?
The tension pulley should have a bolt that holds it on, allowing you to replace the unit.
The pulley for the serpentine belt sheared off. I have a new pulley and need to know how many washers should be on the front and behind the pulley to work properly?
It shaves a belt.
