Sandy asks…Neglecting reaction time, the distance required for a car to stop is directly proportional to the square of itNeglecting reaction time, the distance required for a car to stop is directly proportional to the square of its velocity. If a car can stop in 8.5 meters at 20 kilometers per hour, approximately how many meters are needed to stop at 50 kilometers an hour?
13.4
21.3
53.1
117.6Nancy answers:Since it is directly proportional we know:
(20km/hr)^2 * x =
Saturday, March 3, 2012
Surfing For Reaction Distance Learning?
Sandy asks…How do i calculate the margin of error for this question?A sample of 25 students measured their reaction time by recording the distance a dropped ruler fell before they caught it. This was then repeated to see whether a learning effect was present. The mean decrease in drop distance between the two trials was 1.36 cm with standard deviation 2.066 cm. The margin of error for a 95% confidence interval for the mean decrease in drop distance for all students is___
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Surfing For Reaction Distance Formula?
Sandra asks…Physics formula for stopping distance?today i was learning about a car, with its reaction time and stopping distance.
If I have a car going at say 50 mph how what formula would i use to get the stopping distance (my reaction time is abut 2 seconds)Nancy answers:S = (Vo^2 - 0) / (2a) + VoTr
A useful conversion factor to memorize is 60 mph ≡ 88 fps, or 15 mph = 22 fps.
Plugging in values we know in the equation above,
s = ^2 / (2a) + (2 s)
s = (24,200 ft^2/s^2) / (3a) +
If I have a car going at say 50 mph how what formula would i use to get the stopping distance (my reaction time is abut 2 seconds)Nancy answers:S = (Vo^2 - 0) / (2a) + VoTr
A useful conversion factor to memorize is 60 mph ≡ 88 fps, or 15 mph = 22 fps.
Plugging in values we know in the equation above,
s = ^2 / (2a) + (2 s)
s = (24,200 ft^2/s^2) / (3a) +
Friday, March 2, 2012
Surfing For Reaction Distance Car?
George asks…Once the brakes have been applied, about how many feet does a car which was going 70mph travel before it stops?Can anyone tell me how to calculate for the braking distance of a car travelling at Xmph...? Say, once the brakes have been applied, about how many feet does a car which was going 70 mph travel before it comes to a stop? And another question is how to calculate for the reaction distance for a car travelling at Xmph...? Eg. About how many feet will the average driver
Surfing For Reaction Distance Driving?
Donna asks…What is your reaction to people who drive in the wrong side?Do you feel such driving is ok for small distance or It should not happen at all.I get frustrated by people who enjoy driving in the wrong side just for fun.
@red top : they let go if you bribe them.Nancy answers:Depends on which country you're in. If they are doing it for fun, then I'd say, if I hit them, its their fault and they will pay to fix my car. I don't think its ever good to drive on the wrong side, because you
@red top : they let go if you bribe them.Nancy answers:Depends on which country you're in. If they are doing it for fun, then I'd say, if I hit them, its their fault and they will pay to fix my car. I don't think its ever good to drive on the wrong side, because you
Surfing For Reaction Distance?
Daniel asks…How do I calculate this reaction distance?The question is: Calculate the reaction distance at 120km/h (=33.3 m/s) for a drive with a reaction time of 0.75 seconds.
What is the formula for this?
Thanks if you can helpNancy answers:The reaction distance is the distance the car travels while the driver is reacting.
Reaction distance = speed x reaction time = 33.3 x 0.75 = 25mRichard asks…how are Reaction Distance and Braking Distance related to Stopping Distance.?My answer is:
What is the formula for this?
Thanks if you can helpNancy answers:The reaction distance is the distance the car travels while the driver is reacting.
Reaction distance = speed x reaction time = 33.3 x 0.75 = 25mRichard asks…how are Reaction Distance and Braking Distance related to Stopping Distance.?My answer is:
Thursday, March 1, 2012
Surfing For Reaction Distance Education?
Daniel asks…How often should I talk to my girlfriend in a long distance relationship? Long but with help you & 10 points!!?(Will give 10 points & answer 3 of your questions each)Ok so we have been dating since sep. but have known each other since july. She moved about 15 hrs away for school in mid aug. so havent seen her for awhile until a week ago when i went to see her for 5 days. And she will be coming back home in 20 days & then dec. 10th she is done with her semester of
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