Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 75PCE
Predict/Explain Figure 2-40 shows a v-versus-t plot for the hammer dropped by the carpenter in Problem 74. Notice that the times when the hammer passes the two windows are indicated by shaded areas. (a) Is the area of the shaded region corresponding to window 1 greater than, less than, or equal to the area of the shaded region corresponding to window 2? (b) Choose the best explanation from among the following:
Figure 2-40
Problem 75
- I. The shaded area for window 2 is higher than the shaded area for window 1.
- II. The windows are equally tall.
- III. The shaded area for window 1 is wider than the shaded area for window 2.
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Scenario: A toy rocket is launched straight upward from a pad 10 ft above ground level with an initial velocity of 80 ft/sec.
Use the general formula for the vertical position (height) of an object moving under the influence of gravity where s0 is the initial vertical position, v0 is the initial velocity, and s is the vertical position of the object.
Calculate the time(s) at which the rocket is at a height of 40 ft. (Round to 1 decimal place.) Is this the maximum height the rocket will reach? Justify your response.
2.-A projectile is fired from the ground with a speed of 98 m/s. If the firing angle is a = 30°, find (a) the maximum height H and the maximum horizontal range R of the projectile, (b) the magnitude and direction of its velocity when t = 2.5 s, (c) the height ( y coordinate) of the projectile where its horizontal position is x = 0.75R. Graphically represent the movement.
Using this information please help me determine the maximum height, total air time, total horizontal distance, and speed 1.50 seconds after firing.
Chapter 2 Solutions
Physics (5th Edition)
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