Question

acceleration
objectives:
analyze and explain velocity vs. time graphs.
vocabulary:
acceleration
practice:

1. list the different ways an object can accelerate.
2. analyze the motion of an object that has an acceleration of 0 m/s²
3. by the time an airplane reaches the end of a runway, it has reached a speed of 80 m/s in 20 s. what is its acceleration?
4. a puppy is running with a speed of 11.2 m/s towards its owner when it gets distracted by a squirrel and stops running. if it halted its run in 2 s, what was the acceleration of the puppy?
5. explain what the slopes on a distance vs. time graph and on a velocity vs. time graph tell you.
6. a ball is dropped from a cliff and has an acceleration of 9.8 m/s². how long will it take the ball to reach a speed of 24.5 m/s?
7. indicate what kind of acceleration is shown in the following graphs. a

Explanation:

Answer:

(10) Speeding up, slowing down, changing direction
(11) The object is moving with a constant velocity (no change in speed or direction)
(12) \(4\ m/s^{2}\)
(13) \(- 5.6\ m/s^{2}\)
(14) Slope of distance - time graph is speed; slope of velocity - time graph is acceleration
(15) \(2.5\ s\)
(16) First graph: positive acceleration; Second graph: negative acceleration; Third graph: zero acceleration