Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Chapter 15.3, Problem 8aTH
Two cars, P and Q, travel in the same direction on a long, straight section of highway. Car P passes car Q, and is adjacent to car Q at time
- Suppose that car P and car Q each move with constant speed. At time
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The record distance in the sport of throwing cowpats is 81.1 m. This record toss was set by Steve Urner of the United States in 1981. Assuming the initial launch angle was 45° and neglecting air resistance, determine (a) the initialspeed of the projectile and (b) the total time interval the projectile was in flight. (c) How would the answers change if the range were the same but the launch angle were greater than 45°? Explain.
Suppose the position of an object moving horizontally after t seconds is given by the following function
s=f(t),
where s is measured in feet, with s>0corresponding to positions right of the origin.
a. Graph the position function.
b. Find and graph the velocity function. When is the object stationary, moving to the right, and moving to the left?
c. Determine the velocity and acceleration of the object at t=1.
d. Determine the acceleration of the object when its velocity is zero.
e. On what intervals is the speed increasing?
f(t)=t^3−15t^2+72 t; 0≤t≤8
Suppose the position of an object moving horizontally after t seconds is given by the following function s=f(t),where s is measured in feet, with s>0corresponding to positions right of the origin.
a. Graph the position function.
b. Find and graph the velocity function. When is the object stationary, moving to the right, and moving to the left?
c. Determine the velocity and acceleration of the object at t=1.
d. Determine the acceleration of the object when its velocity is zero.
e. On what intervals is the speed increasing?
f(t)=t^3−15^2+72t; 0≤t≤8
Chapter 15 Solutions
Tutorials in Introductory Physics
Ch. 15.1 - Describe the motion. During which periods of time,...Ch. 15.1 - Find the object’s instantaneous velocity at each...Ch. 15.1 - For each of the following intervals, find the...Ch. 15.1 - In which of the cased from part c, if any, is the...Ch. 15.1 - In the interval from t=0s to t=6s , does the...Ch. 15.1 - In the small box on the graph above is a portion...Ch. 15.1 - Next, we expand the section of the previous graph...Ch. 15.1 - All three graphs are representations of the same...Ch. 15.1 - Suppose that the object is speeding up. Which of...Ch. 15.1 - Suppose that the object is slowing down. Which of...
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- The record distance in the sport of throwing cowpats is81.1 m. This record toss was set by Steve Urner of the UnitedStates in 1981. Assuming the initial launch angle was 45°and neglecting air resistance, determine (a) the initial speedof the projectile and (b) the total time the projectile was inflight. (c) Qualitatively, how would the answers change if thelaunch angle were greater than 45°? Explain.arrow_forwardJohn walks 1.00 km north, then turns right and walks 1.00 km east. His speed is 1.50 m/s during the entire stroll.a. What is the magnitude of his displacement, from beginning to end?b. If Jane starts at the same time and place as John, but walks in a straight line to the endpoint of John’s stroll, at what speed should she walk to arrive at the endpoint just when John does?arrow_forwardThe record distance in the sport of throwing cowpats is 81.1 m. This record toss was set by Steve Urner of the United States in 1981. Assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) Determine the initial speed of the projectile.m/s(b) Determine the total time the projectile was in flight.s(c) Qualitatively, how would the answers change if the launch angle were greater than 45°? Explain.arrow_forward
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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