http://www.ck12.org Chapter 2. Motion in a Straight Line
Practice
Questions
This url shows a video of a discussion and demonstration of the acceleration due to gravity.
http://www.youtube.com/watch?v=izXGpivLvgY
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/60001- What is the gravitational acceleration given in the video? Why does it differ from that given in this text?
- Why does the ball travel further in later time intervals than in the earlier ones?
Review
Questions
- A baseball is thrown vertically into the air with a speed of 24.7 m/s.
(a) How high does it go?
(b) How long does the round trip up and down require?- A salmon jumps up a waterfall 2.4 m high. With what minimum speed did the salmon leave the water below
to reach the top? - A kangaroo jumps to a vertical height of 2.8 m. How long will it be in the air before returning to earth?
- acceleration due to gravity:The acceleration experienced by a body in free fall in a gravitational field.
The first thing physics is used to describe is motion. Motion is characterized by position, displacement, distance,
speed, velocity, and acceleration. Kinematic equations show how these properties are linked; the three equations
given in this chapter can be used, assuming constant acceleration, to determine the relationship between an object’s
displacement, velocity, and acceleration.