The centripetal acceleration of a car moving around a circular curve at a constant speed of $22 \mathrm{~m} / \mathrm{s}$ has a magnitude of $7.8 \mathrm{~m} / \mathrm{s}^2$. Calculate the radius of the curve.

The velocity-time graph in Figure mentioned the change in velocity for a truck. (a) At what point is the instantaneous velocity of the truck equal to the average velocity? (b) Determine the magnitude of the acceleration of the truck from the graph in Figure mentioned.

Consider the different topics you have studied in this chapter. Choose one that you feel has an important impact on your life. Write a one-page report about the topic, explaining why it is important to you. What else would you like to know about this topic? How could you go about learning this?

The position-time graph in Figure 6 describes the westward motion of a car. (a) From the graph, estimate the total displacement of the car. (b) From the graph, estimate the average velocity of the car.

How has your understanding of uniform circular motion changed? Did you learn anything particularly relevant to you on this topic?

A cylindrical spacecraft rotates around its axis. (a) Explain how rotating a spacecraft produces artificial gravity. (b) Explain how the spacecraft could be used to simulate the gravity an astronaut would experience on Earth.

Prepare a Know-Want to Know-What You Learned (K-W-L) chart on the topic of artificial gravity or another topic from this chapter.

A spacecraft moves with constant speed in a circular orbit around a planet. Then the spacecraft accelerates in the direction it is moving. Arrange the statements below in the correct order to explain why the distance of the spacecraft from the planet must increase in order to remain in a circular orbit. (a) The centripetal force is provided by gravity, which depends on mass and distance. (b) To offset the increase in speed, the distance must also increase. (c) An acceleration in the direction the spacecraft is moving means that the spacecraft is increasing in speed. (d) The masses of both the spacecraft and the planet are constant, so the distance from the planet must change.

In this chapter, you learned how to solve some types of centripetal force problems. What questions do you still have about solving centripetal force problems?

What did you learn in this chapter that was surprising? Explain your answer.

List three examples in which centripetal forces affect the motion of an object.

For an object moving in a circular path, distinguish between the behaviour of centripetal acceleration and acceleration along the direction of motion.

How would you explain the concepts of artificial gravity to a fellow student who has not taken physics?

You are riding on a bus. During your trip, you place a heavy book on the floor. When the bus turns right at a constant speed, the book slides to the left side of the bus. (a) Describe how the book's motion provides an example of a fictitious force in a non-inertial frame of reference. (b) Suppose the book did not slide but remained in its original position on the floor. How would this demonstrate the existence of a centripetal force?