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A car travelling at a speed of 16.67m/s brought to rest by means of the breaks in a distance of 50m. what is accelaration?

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There is no acceleration, just deceleration. which is -.35m/s (rounded)

Posted on May 18, 2011

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Sometimes when I am speeding, I notice the car seems to be braking when I am not hold or matching any of the brake's pedals... after a while it relaeses and the car starts accelarating well again...


adaptive cruise control is regulating speed or perhaps if a newer car, it may have collision-warning system because even when cruise control is off they may maintain following distance.

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So I got this H.W question, can you see if you can put it into an equation, and solve it? How fast is each boat traveling in knots? The tall ships speed multiplied by 10 hours equals the distan


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HOW USE TACHYMETER & WHAT TACHYME3TER MEANS


A Tachymeter helps you estimate the speed you are going.

It uses the basic formula that speed = Distance/time

Here is how to use it: (For the full article see the link below)

To use tachymeter, simply start the chronograph or stopwatch when the object measured passing the starting line. When the object reaches the next mile or kilometer marker, stop the chronograph or stopwatch. The point on the tachymeter scale that adjacent to the second hand of the watch indicating the speed (in miles per hour or kilometers per hour) of object traveling between the two points.

For example, we want to measure the average speed of a vehicle is moving. Start the chronometer or stopwatch function when the car passes the starting line, and stop the timer after the vehicle traveled exactly 1 mile or 1 kilometer. Then look at where the chronometer hand (the second hand of the watch) is pointing to, and get the reading or value of the corresponding number at the tachymeter bezel or dial. Let's say the stopwatch stop at 3 o'clock position, meaning 15 seconds had elapsed for the car to travel 1 mile or 1 kilometer. At 3 o'clock position, the tachymetre value shows that number of 240, which means the average speed of the vehicle was 240 mph or km/h.

Source(s):

http://www.mydigitallife.info/2006/12/10...

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Santa with his son Banta were traveling on a boat after traveling one mile from the starting point the hat of Santa fell down. After 5 minutes Banta told his father about the hat. Santa turned the boat and...


At time 'ZERO', the hat was at distance 'ZERO' from the starting-point.
At time 'T', the hat was at distance 'ONE MILE' from the starting point.
The speed of the boat was the MAXIMUM speed of the boat, MINUS the speed of the current.
At time 'T+5', the hat was being carried by the stream-current toward distance 'ZERO'.
At time 'T+10', the hat was at distance 'ZERO', and the boat was at distance 'ZERO'.
The speed of the boat for the most-recent '10' minutes was the MAXIMUM speed, PLUS the speed of the current.

So, calculate the distance travelled at the 'T+5' time:
DISTANCE = VELOCITY1 multiplied by TIME1.
DISTANCE = VELOCITY2 multiplied by TIME2.

where 'VELOCITY1' is the speed travelling AGAINST the current,
and 'VELOCITY2' is the speed travelling WITH the current.

Finish this "homework" assignment on your own.


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2 Answers

The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 40 mph car stop in 90ft, how many feet will it take the same car to stop when...


The stopping distance is proportional to square of speed.

that is 90ft proportional to 40^2 mph.

We can write as 90 = X * 40^2. ( X is a constant of proportionality) .

Which implies X = 90 / 1600 = .05625.

Assume S be the distance at which car stops when the speed is 90 mph.

S = X * 90^2. ( since X does not vary as same car is used)

=> S =.05625 * 8100 = 455.625 ft.

Thank you.

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Is it normal when i have 4wd H and i am turning for the wheels to squeel


it is normal. check your air pressure though and that will help. dont put too much in or you will wear out the center of your tires.

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Can gamin 255w indicate closer distance eg 50m turn left?


In my experience, my Garmin 255W repeats many times the same order as you are reaching the turning point. First it tells, for example, "in 600 m keep the left lane and then turn left". As you approach that distance it repeats "keep the left lane and then turn left". Once you reached the 600 m it says "turn left" without further stating any distance. It depends on how speed you drive which is recognized by the device. The faster you go, the earlier it will tell you the next change in your route so you can have time to act.

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2 Answers

Inter physics


it should be about 40-50kmph that is the ballpark figure. (and a reasonable answer)

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