Jason drives due west with a speed of 35.0 mi/hr for 30 mins, then continues in the same direction with a speed of 60.0 mi/hr for 2.00 hr then drives farther west at 25.0 mi/hr for 10.0 mins. What is his average velocity?

Answer 1

d1 = 35 mi/hr * 0.5 hr = 17.5 mi,
d2 = 60 mi/hr * 2 hr = 120 mi,
d3 = 25 mi/hr * 1/6 hr = 4.17 mi.

d = 17.5 + 120 + 4.17 = 141.67 miles,
t = 0.5 + 2.0 + 1/6 = 2.67 hrs,

Vavg = d / t = 141.67/2.67 = 53.13 mi/hr.


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