COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 2, Problem 79QAP
To determine
(a)
The time taken by the snake to reach its top speed.
To determine
(b)
The distance travelled by the snake in 0.494 sec.
To determine
(c)
The mongoose reaction time before the tail of the mamba snake passes by.
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Required information: A cheetah can accelerate from rest to 52.9 m/s in 2.00 s. Assume that the acceleration is constant over the time interval.
a) What is the magnitude of the acceleration of the cheetah?
b) What is the distance traveled by the cheetah in these 2.00 s?
c) A runner can accelerate from rest to 7.30 m/s in the same time, 2.00 s. What is the magnitude of the acceleration of the runner?
d) A runner can accelerate from rest to 7.30 m/s in the same time, 2.00 s. By what factor is the cheetah’s average acceleration magnitude greater than that of the runner?
Fact check. Which of the following is/are always TRUE?
I. Instantaneous speed is equal to the magnitude of instantaneous velocity.
II. Average speed is equal to the magnitude of the average velocity.
III. Distance traveled is equal to the magnitude of the displacement.
O I l only
O Ill only
O I and Il only
O I only
You are driving your car along a country road at a speed of 27.0 m/s. As you come over the crest of a hill, you notice a
farm tractor 25 m ahead of you on the road, moving in the same direction as you at a speed of 12.0 m/s. You immediately
slam on your brakes and slow down with a constant acceleration of magnitude 8 m/s2. Will you hit the tractor before you
stop?
Ο NO
O Yes
How far will you travel before you stop or collide with the tractor?
6.5
X m
If you stop, how far is the tractor in front of you when you finally stop? (If you instead collide, enter 0 below.)
m
Enter a number.
Submit Answer
Chapter 2 Solutions
COLLEGE PHYSICS
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Position/Velocity/Acceleration Part 1: Definitions; Author: Professor Dave explains;https://www.youtube.com/watch?v=4dCrkp8qgLU;License: Standard YouTube License, CC-BY