8. A race car slows down to make a turn. If it has an initial velocity of 170 km/h [E] and accelerates at a rate of 1.7 m/s2 [W] for 3.3 s, at what velocity does the race car make the turn? 9. A student is throwing rocks off a bridge straight down into the river below. If he throws a rock with an initial speed of 3 m/s and it takes the rock 1.7 s to hit the water, how high is the bridge? 10. A truck is travelling at a constant velocity of 26 m/s [E]. The driver sees a trafc light turn om red to green soon enough, so he does not have to alter his speed. Meanwhile, a woman in a sports car is stopped at the red light. At the moment the light turns green and the truck passes her, she begins to accelerate at 2.5 rn/sz. a) How long did it take for the sports car to catch up with the truck? b) How far have both vehicles travelled when the sports car catches up with the truck? THINKING 12. Is it possible for an object to be accelerating and at rest at the same time? Explain. 13. For the same initial upward velocities, how many times higher will an object travel above the lunar surface (gM = 1.6 m/s2 [down]) than above the surface of Earth (g; = 9.8 m/s2 [down]) ? Assume negligible air resistance on Earth. Show your calculations. 14. An object is thrown downward with a velocity 10 m/s om the roof of a building. It took the object twice as long to cover the rst half of the distance to the ground than the second half. Find the height of the building