A marathon runner completes a 42.188km42.188km course in 2h2h , 30 min, and 12s12s . There is an uncertainty of 25m25m in the distance traveled and an uncertainty of 1 s in the elapsed time. (a) Calculate the percent uncertainty in the distance. (b) Calculate the uncertainty in the elapsed time. (c) What is the average speed in meters per second? (d) What is the uncertainty in the average speed?

(a) If your speedometer has an uncertainty of 2.0km/h2.0km/h at a speed of 90km/h90km/h , what is the percent uncertainty? (b) If it has the same percent uncertainty when it reads 60km/h60km/h , what is the range of speeds you could be going?

(a) A car speedometer has a 5.0%5.0% uncertainty. What is the range of possible speeds when it reads 90km/h90km/h ? (b) Convert this range to miles per hour. (1 km=0.6214 mi)

An auto travels at a rate of 25 km/h for 4 minutes, then at 50 km/h for 8 minutes, and finally at 20 km/h for 2 minutes. Find the average speed for the complete trip in meters per second. (Give the answer to one decimal place accuracy.)

A participant in a marathon runs at an average speed of 4 metres per second.  What distance will she cover in 10 minutes?150 m240 m40 m2.4 km2In part of a race, a car covers a distance of 2 km at an average speed of 40 m/s.  How long did it take to complete this part of the race?20 s80 s50 s0.05 s3A man jogs 200 m in one minute, rests for 30 seconds, and then jogs a further 300 m in two minutes.  Calculate his average speed for this journey.2.50 m/s3.33 m/s2.38 m/s2.92 m/s4A man jogs 200 m at a constant speed for one minute, rests for 30 seconds, and then jogs a further 300 m at a constant speed for two minutes.  Calculate his maximum speed for this journey.2.92 m/s2.38 m/s2.50 m/s3.33 m/s5Which of the following is the approximate speed at which a cyclist might travel, on average?5 m/s0.5 m/s50 m/s500 m/s6In the lab, a rubber bung is attached to a piece of string and is swung around in a circular path.  The rubber bung moves around its circular path at a steady rate of one complete revolution per second.  Which of the following statements correctly describes its motion?Its velocity is constant but its speed is always changingBoth its speed and its velocity are constantIts speed is constant but its velocity is always changingBoth its speed and its velocity are always changing

Aptitude:speed and distance [Section 1 of 1] Q24 of 30 Marks 1 General Instructions 100% ×CloseTest time left: 06:13Select the correct answerA train has to cover a distance of 900 km in 25 hours. What should be its average speed in meters/second?