At the start of your vacation, you drive for four hours and 31 minutes, from you
ID: 2165052 • Letter: A
Question
At the start of your vacation, you drive for four hours and 31 minutes, from your home to a cottage you have rented for a week. The car odometer says that the trip covered a distance of 175.9 miles. When you check your GPS, however, it tells you that the straight-line distance from your home to the cottage is 130.2 miles.You might find it helpful to know that there are 1.609344 km in a mile.
(a) What is your average speed for your trip from your house to the cottage? Express your answer in units of m/s.
b) What is the magnitude of your average velocity for your trip from your house to the cottage? Express your answer in units of m/s.
Explanation / Answer
avg speed = 175.9 x 1.609344 x 1000 /[(4x60+31)x60] = 17.4 m/s avg velocity = 12.88m/s
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