Question
See Sample Problem A. A school bus takes $0.530 \mathrm{h}$ to reach the school from your house. If the average velocity of the bus is $19.0 \mathrm{km} / \mathrm{h}$ to the east, what is the displacement?
Step 1
The time (t) is given as 0.530 hours and the average velocity (v) is given as 19.0 km/h to the east. Show more…
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A school bus takes $0.530 \mathrm{h}$ to reach the school from your house. If the average velocity of the bus is $19.0 \mathrm{km} / \mathrm{h}$ to the east, what is the displacement? (See Sample Problem 2A.)
You drive west at $75 \mathrm{~km} / \mathrm{h}$ for $20 \mathrm{~min}$, then follow a road that goes $40^{\circ}$ south of west, driving at $90 \mathrm{~km} / \mathrm{h}$ for another $40 \mathrm{~min}$. Find (a) your total displacement and (b) your average speed and average velocity for the trip.
A car drives north at $45 \mathrm{~km} / \mathrm{h}$ for $12 \mathrm{~min}$ and then turns east and goes $6.0 \mathrm{~km}$ at $90 \mathrm{~km} / \mathrm{h}$. Finally, it goes southwest at $60 \mathrm{~km} / \mathrm{h}$ for $7.0 \mathrm{~min}$. Determine the car's (a) displacement and (b) average velocity for this trip.
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