Answer the following questions to check your understanding of the lesson. Use the photo to answer Questions 3 and 4.
3. This rock, known as Balanced Rock, sits on a thin pedestal of rock in a canyon in Idaho. Balanced Rock exerts a downward/ an upward force on the pedestal. At the same time, the pedestal exerts a downward/ an upward force that is equal in size and opposite in direction. That is why Balanced Rock is stable!
4. Which statements describe the motion of Balanced Rock relative to different reference points?
A. The rock is at rest no matter which reference point is used.
B. The rock is accelerating compared to the sun. C. The rock is not accelerating compared to the sun.
D. The rock has a constant velocity relative to the moon.
