College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Chapter 3, Problem 13CQ
Answer the following questions for projectile motion on level ground assuming negligible air resistance (the initial angle being neither 0° nor 90°) (a) Is the velocity ever zero? (b) When is the velocity a minimum? A maximum? (c) Can the velocity ever be the same as the initial velocity at a time other than at
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The magnitude of the velocity of a projectile when it is at its maximum height above ground level is 10.0 m/s. (a) What is the magnitude of the velocity of the projectile 1.00 s before it achieves its maximum height? (b) What is the magnitude of the velocity of the projectile 1.00 s after it achieves its maximum height? If we take x = 0 and y = 0 to be at the point of maximum height and positive x to be in the direction of the velocity there, what are the (c) x coordinate and (d) y coordinate of the projectile 1.00 s before it reaches its maximum height and the (e) x coordinate and (f) y coordinate 1.0 s after it reaches its maximum height?
A ball is thrown vertically upward with an initial speed of 88 ft/sec from the base A of a cliff with H = 60 ft. Determine the distance h
by which the ball clears the top of the cliff and the time t after release for the ball to land at B. Also, calculate the magnitude of the
impact velocity vg. Neglect air resistance and the small horizontal motion of the ball.
Answers:
h =
i
ft
t =
i
sec
VB =
i
ft/sec
The maximum horizontal distance a boy can throw a ball is 50 m. Assume he can throw with the same
initial speed at all angles. How high does he throw the ball when he throws it straight upward?
Chapter 3 Solutions
College Physics
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