1)A student drove to the university from her home and noted that the odometer reading of her car increased by17.9km. The trip took19min.

What was her average speed, in kilometers per hour?

If the straight-line distance from her home to the university is5.5km in a direction 25 south of east, what was the magnitude of her average velocity in kilometers per hour?

If she drove back home using the same path she took out to the university and arrives7.8h after she first left home, what was her average speed for the entire trip, in kilometers per hour?

2)Consider taking a drive along a winding road.

Glancing at the speedometer of your car gives you ______.

1. both your car's instantaneous speed and its instantaneous velocity
2. your car's instantaneous velocity?
3. your car's instantaneous speed?

3) A rock is thrown straight upward, then falls back down. Consider the motion of the rock from the time just after it is thrown, to the time just before it hits the ground. Neglect air resistance.

Which of the following quantities is zero at least one point in the rock's flight?

A) Velocity?

B) Acceleration

C) Both acceleration and velocity

D) Neither acceleration, nor velocity?

Which of the following quantities changes direction during the rock's flight?

A) Velocity?

B) Acceleration

C) Both acceleration and velocity

D) Neither acceleration, nor velocity?

Which of the following quantities is constant during the rock's flight?

A) Velocity?

B) Acceleration

C) Both acceleration and velocity

D) Neither acceleration, nor velocity?

4)

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