A Couple of Physics Questions...?

Question

These are right out of the book:

1) Driving a jet-powered car, Royal Air force pilot Andy Green broke the sound barrier on land for the first time and achieved a record land speed of more than 763 mi/h in Black Rock Desert, Nevada, in Oct. 15, 1997. (a)What is the speed expressed in m/s? (b) How long would it take the jet powered car to travel the length of a 300-ft football field at this speed?

2.) Using a meter-stick, a student measures a length and reports to be 0.8755 m. What is the smallest division on a meter-stick scale?

3.) The Channel Tunnel which runs under the English Channel between Great Britain and France, is 31 mi long. A shuttle train that carries passengers through the tunnel travel an average speed of 75 mi/h. On average, how long, in minutes, does the shuttle take to make a one way trip through the Tunnel?

Answer 1

1) use your calculator

763 mi/h = 341 m/s = 1119 ft/s

300-ft / 1119 ft/s = 0.268 sec

2) depends on the meter stick and how much he interpolates. Probably 1 mm

3) 31 mi / 75 mi/h = 0.413 hour or 24.8 minutes

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