Wiki User
∙ 12y agoAssuming a constant, linear deceleration, it takes four times the distance to stop when you double your speed.
Using the formula v2 = u2 + 2as
where v is final speed
u is initial speed
a is acceleration
s is distance
We can rearrange the formula to solve for s giving: s = (v2 - u2)/2a
If we are finding the distance to that it takes to stop, the final velocity will be 0.
Therefore distance to stop is given by s = -u2/2a
Now we will look at the distance it takes to stop when speed is doubled. This will make our initial speed 2u.
s = -(2u)2/2a = -2u2/a
Comparing the two, we can see that when initial speed is doubled, it takes four times the distance to stop.
(While it may look strange in the formula to have a negative sign in a distance measurement, remember that the car is decelerating, giving a negative acceleration. This means that the overall expression for distance will be positive.)
Wiki User
∙ 12y agoThat depends on the speed. Pick a speed, then divide the distance by the speed. If you divide a distance in miles, by a speed in miles/hour, the answer will be in hours.
mph is a measure of speed, km is a measure of distance. Speed = Distance/Time. You cannot convert distance into speed without knowledge of the time taken for the journey.
That depends a lot on the speed. Use the formula distance = speed x time. Solving for time, time = distance / speed.
You need speed to calculate this. Distance is speed / time
You need speed to calculate this. Distance is speed / time
It will also double, according to Newton's Second Law.
The distance must be doubled to reduce the sound intensity by half. This follows the inverse square law, which states that sound intensity decreases in proportion to the square of the distance from the source.
Eight times larger.
is adds your total distance and speed times the temperaturs and it tells u how many cubic feet you've truly walked.
Hours is time. Miles is length/distance.. No conversion. If you want to know driving times, you need a speed. (or at least an average speed.)
That depends on the speed. Divide the distance by the speed to calculate this.That depends on the speed. Divide the distance by the speed to calculate this.That depends on the speed. Divide the distance by the speed to calculate this.That depends on the speed. Divide the distance by the speed to calculate this.
That depends on the speed. Pick a speed, then divide the distance by the speed. If you divide a distance in miles, by a speed in miles/hour, the answer will be in hours.
That depends on the speed. Choose a suitable speed, then divide the distance by the speed. If the distance is in kilometers, and the speed is in kilometers/hour, then the time will be in hours.That depends on the speed. Choose a suitable speed, then divide the distance by the speed. If the distance is in kilometers, and the speed is in kilometers/hour, then the time will be in hours.That depends on the speed. Choose a suitable speed, then divide the distance by the speed. If the distance is in kilometers, and the speed is in kilometers/hour, then the time will be in hours.That depends on the speed. Choose a suitable speed, then divide the distance by the speed. If the distance is in kilometers, and the speed is in kilometers/hour, then the time will be in hours.
mph is a measure of speed, km is a measure of distance. Speed = Distance/Time. You cannot convert distance into speed without knowledge of the time taken for the journey.
Two times larger.
You need to know the speed, to see how long it will take you to travel that distance. Once you know the speed, divide the distance by the speed, to get the time.You need to know the speed, to see how long it will take you to travel that distance. Once you know the speed, divide the distance by the speed, to get the time.You need to know the speed, to see how long it will take you to travel that distance. Once you know the speed, divide the distance by the speed, to get the time.You need to know the speed, to see how long it will take you to travel that distance. Once you know the speed, divide the distance by the speed, to get the time.
That depends a lot on the speed. Use the formula distance = speed x time. Solving for time, time = distance / speed.