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Does friction provide negative acceleration or positive acceleration?
Wiki User
∙ 13y ago
Friction opposes motion. As long as you define the direction in which the object is moving to be positive, the acceleration due to friction will be negative. If you think about it, you start out with positive speed and friction decreases the speed, so adding friction subtracted from the speed.
Note: Friction is counterintuitive when you start dealing with rolling without slipping. This answer doesn't address this.
Wiki User
∙ 13y ago
Wiki User
∙ 9y agoFrictional force reduces aceleration, a= (F-friction)/m
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Why are air resistance and friction similar?
They both provide an opposing force against acceleration.
Why does friction never speed up?
Friction always opposes relative motion. It does not oppose motion. Friction is an electric force. It starts acting when two surfaces rub each other. Say a block is pushed and then released, it gets an initial acceleration and its speed starts increasing. Here friction starts playing its part. Friction starts acting on the block in the direction opposite to that of its motion and it also acts on the ground but its effects there are negligible. The friction slowly reduces the acceleration to zero, then at that stage the block has some velocity. Now also friction continues acting backward on it till it comes to rest.Now there is no relative motion or rubbing so no charges appear on the surfaces to provide a frictional force for speeding up the block.
How do we decrease friction in machines?
You provide lubrication.
Which would provide greater friction -carpet or lino?
it would be carpit
What would provide greater friction- carpet or lino?
carpet... the lino allows things to slide across it easily, creating minimal friction. the carpet has hairs which catch on things and generates a large amount of friction.
Why are air resistance and friction similar?
They both provide an opposing force against acceleration.
The product of an odd number of negative factors is positive?
False.positive x positive = positivepositive x negative = negativenegative x positive = negativenegative x negative = positiveEvery 2 negative factors provides a positive result, so if there are an odd number of negative factors, there are 2n + 1 of them which means the 2n would provide a positive factor to be multiplied by the final negative factor which gives a negative result.
What kind of environment does homeostasis provide?
A. positive B. balanced C. negative D. unhealthy
What is the acceleration a rocket that is 45kg with a thrusting force of 150N but friction is 25N?
Net force is 150N - 25N, or 125N. By Newton's Second Law of motion, acceleration is force divided by mass, so acceleration is 125N divided by 45kg, or 2.78 m s-2.Note: This is a "trite" example, because friction is dependent on velocity, but the question provided a fixed friction. Also, mass varies with time as fuel is consumed, but again the question did not provide those details.
Can Voltage dividers can provide only positive output voltages?
Voltage dividers can provide anything between VCC (the most positive voltage in the circuit) and VSS (the most negative voltage in the circuit). For example, if VCC =0 and VSS = -15, then the output voltage has to be negative. ========================
2 critical pieces of info to provide in uxos?
post attack findings and the presence of uxos both positive and negative
How does negative feedback work?
To remove the distortion ... ANSWER: It does not reduce distortion but rather make the circuit stable. There can be distortion even with negative feedback by bad design in other word feedback does not reduce distortion.
How do you use an ammeter?
The Positive side of the Ammeter should be connected to the positive side of the battery and the Negative side should be connected to the Globe/Conductor/Insulator to provide a valid reading.
Any acceleration implies the presence of what?
A mass to be accelerated and a force to provide the acceleration.
What does th osprey provide to the wren?
Nothing, the two species occupy very different niches, and have no contact either negative or positive.
Why does friction never speed up?
Friction always opposes relative motion. It does not oppose motion. Friction is an electric force. It starts acting when two surfaces rub each other. Say a block is pushed and then released, it gets an initial acceleration and its speed starts increasing. Here friction starts playing its part. Friction starts acting on the block in the direction opposite to that of its motion and it also acts on the ground but its effects there are negligible. The friction slowly reduces the acceleration to zero, then at that stage the block has some velocity. Now also friction continues acting backward on it till it comes to rest.Now there is no relative motion or rubbing so no charges appear on the surfaces to provide a frictional force for speeding up the block.
Do you attach a battery's positive terminal to a positive terminal and a negative terminal to a negative terminal to increase their capacity?
positive (red wire) to positive post (+) negative (black wire) to negative post (-) positive (red wire) to positive post (+) negative (black wire) to negative post (-) posiItive (red wire) to positive post (+) negative (black wire) to negative post (-) If you want the batteries to provide the same voltage but more current, hook them up this way. If you want the voltage increased but the current remain the same, hook the up with negative post to positive post and so on, until the voltage is what you want. For example using regular flashlight batteries of 1.5 volts, the first way, using only two batteries, you still have 1.5 volts but the batteries now will last twice as long. Using the second way, the batteries last only just as long as a single battery but you have 3.0 volts instead.
