Astronomy Follow-up Lesson: Introduction to Motion
(1) What is the difference between speed and velocity? __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________
(2) As a roller coaster car starts down a slope, its speed is 4 m/s. But 3 seconds later, at the bottom, its speed is 22 m/s. Answer the following questions:
What is the initial speed of the roller coaster car?
What is the final speed of the roller coaster car?
How much time did the car spend coming down the slope?