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The Question & Answer (Q&A) Knowledge Managenet

The Internet has many places to ask questions about anything imaginable and find past answers on almost everything.

Table of Contents

- What is one cycle of a wave?
- What is the equation for period?
- What is the period T?
- Is period revolutions a second?
- How fast is 2000 rpm?
- Is RPM a speed?
- How fast is 2000 rpm in mph?
- How fast is 7000 rpm?
- How many RPM is normal?
- How many RPMs is 75 mph?
- How many RPMs is 70 miles per hour?
- How many RPMs is 60 mph?
- How many RPMs is 50 mph?
- What should your RPMs be at 80 mph?
- Can high rpm damage engine?
- Is it bad to shift at 5000 rpm?
- Is it bad to run your car at 3000 rpm?
- What is a safe RPM range?
- Is 5000 rpm too much?
- What is normal rpm at idle?
- Is it bad to drive at low rpm?
- Is it OK to drive in 4th gear?
- Should the rpm be at 0 in idle?
- Can you gear 1 gear 3?
- Is it bad to start in 2nd gear?
- Which gear is best for driving uphill?
- Can I go from 4th gear to neutral?
- Can you come to a complete stop in 1st gear?

One cycle of a wave is one complete evolution of its shape until the point that it is ready to repeat itself. The period of a wave is the amount of time it takes to complete one cycle. Frequency is the number of complete cycles that a wave completes in a given amount of time.

pendulums. … each complete oscillation, called the period, is constant. The formula for the period T of a pendulum is T = 2π Square root of√L/g, where L is the length of the pendulum and g is the acceleration due to gravity.

A period T is the time required for one complete cycle of vibration to pass a given point. As the frequency of a wave increases, the period of the wave decreases. Frequency and Period are in reciprocal relationships and can be expressed mathematically as: Period equals the Total time divided by the Number of cycles.

A traditional unit of measure used with rotating mechanical devices is revolutions per minute, abbreviated RPM. 60 RPM equals one hertz (i.e., one revolution per second, or a period of one second). The SI unit for period is the second.

If you’re driving a stick shift in 1st gear and the engine is at say 2000 rpm you’re only going to be going like 15 mph. In a higher gear at 2000 rpm you will be going faster (maybe 50 mph).

Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or with the notation min−1) is the number of turns in one minute. It is a unit of rotational speed or the frequency of rotation around a fixed axis.

Original question: What’s the formula to convert rpm to mph and mph to rpm? If you have a tachometer and a speedometer, you divide the rpm by the speed, so 50 miles per hour or 80 kilometers per hour at 2000 rpm would be 40 rpm per mile per hour or 25 rpm per kilometer per hour.

about 91.7 mph

For a passenger car engine, idle speed is customarily between 600 and 1000 rpm. For medium and heavy duty trucks, it is approximately 600 rpm. For many single-cylinder motorcycle engines, idle speed is set between 1200 and 1500 rpm. Two-cylinder motorcycle engines are often set around 1000 rpm.

3000 RPM

2500 rpm

1500 rpms

4000 RPM

High RPM get much worse nearing max RPM. Max RPM is the limit that the engine can take before severe damage. Running at or near max RPM for extended periods will drastically reduce engine life. Engines are usually more efficient at lower RPM as well.

If you drive at 5,000 RPM, that bearing is going to use up its lifetime twice as fast as if you were driving at 2,500 RPM. On the other hand, “lugging” an engine at too low an RPM can be harmful, as well. If your prime directive is mechanical lifetime, shoot for lower RPM within a reasonable range (i.e. not lugging).

Running an engine some 3000 RPM below its redline should be absolutely find for extended periods of time. So long as your oil and coolant is in good condition, timing belt in good order etc, then most engines will handle this sort of driving for hours per day.

For the best fuel efficiency, keep your RPMs between 1,500 and 2,000 RPM when driving at a constant speed.

5000 is where the fun starts. It’s not staying there for extended periods. You’ll be fine. The reason it’s so sluggish is that the transmission is programmed to save fuel so it’s always in a higher gear.

about 600-800 rpm

As long as you’re not accelerating hard or going uphill in a high gear at a low rpm you’ll be fine. Low rpm is no way harmful but you must understand the specific engine power characteristics. You can drive at lower rpm but you’ve to shift to lower gear as well.

Page 82 states that “Driving excessively in 4th gear will lead to a known but unpreventable condition called SMEF or Spontaneous Massive Existance Failure whereas your car will be taken from you and given to someone who knows how to drive stick.” Just messin’ with ya, you’re fine.

The engine will operate at idle and the rpm will indicate between 800 and 1000 rpm. When you switch the engine off the rev counter will indicate 0 rpm. For a zero reading your engine must not be running. Most engines idle at between 600 to 900 RPM.

You can shift to any gear you want, provided you’re at the correct speed range to do so.

It’s a totally fluid coupling, and since there’s no clutch plate to wear down, it doesn’t pose a real risk. Most automatic transmissions have a W (Winter) mode that starts off in second gear to help prevent the tires from spinning on slick pavement. So, for most drivers, starting in second gear is really no issue.

When you’re driving uphill, change down to a lower gear to avoid the engine struggling to give enough power. Driving downhill, you can use a lower gear to increase the effect of engine braking and reduce the risk of overheating the brakes.

Like the others have said, you can safely put the car into neutral at any time. However, if you’re slowing down, you can just lift off of the throttle which will cause your car to slow down due to engine braking.

Do not leave it in first gear when at a stop When you do bring the car to a stop, do not leave in the car in first gear with your clutch pedal pressed in. This, again, will wear out the clutch and transmission parts over time, so we suggest just leaving the car in neutral with your foot on the brake.