A person commutes 80 miles to work.If it takes 1.5 hours, what is his/her averag

Question

A person commutes 80 miles to work.If it takes 1.5 hours, what is his/her average speed? a. in mph b. in km/s c. in m/s In 2009 Usian Bolt set the record for the 100 meter dash, completing the run in 9.58 s. Compute his average speed for this run a. in mph b. in km/s c. in m/s In 2009 Cesar Cielo set the record for the 50 meter freestyle swim. If his average speed of the race was 2.39 m/s, how long did it take him to finish the race? The Moon moves in a nearly circular orbit around the Earth with an average radius of 3.84 x 10 m. If it takes 27.3 days to complete one orbit, determine its average orbital speed in m/s. If we see a flash of lightning followed by the sound of thunder 2.0 seconds after the flash, how far away did the lightning strike considering a speed of sound of 343 m/s (light can be assumed to travel to the observer instantaneously) Consider the graph below. What is the velocity between (a) A and B, (b) B and C, (c) D and E and (d) F and G position (m) 8 5 11 20 30 40 44 :time (scc) 5 A B

Explanation / Answer

Problem 1)

Distance, d = 80 miles

Time, t = 1.5 hours

A) speed , v = 80/1.5 = 53.33 m/h

B) speed, v = 128.75/5400 = 0.024 km/s

C) speed, v = 128748/5400 = 23.84 m/s

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