COLLEGE PHYSICS
COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 2, Problem 33QAP
To determine

The equation for x(t) for each interval of constant acceleration motion for the object whose position as a function of time.

Expert Solution & Answer
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Answer to Problem 33QAP

Between t=0 s and t=4.5 s ; x(t)=6t12

Between t=4 s and t=5 s ; x(t)=3t

Between t=5 s  and t=8 s ; x(t)=15 m

Between t=8 s and t=13 s ; x(t)=1.5t222.5t+99

Between t=13 s and t = 21 s ; x(t)=5t5

Between t=21 s and t=24 s ; x(t)=10t+310

Between t=24 s and t=25 s ; x(t)=70 m

Explanation of Solution

Introduction:

We can determine the equation for x(t) at each time interval by plotting a graph of position versus time and calculating the slope and the intercepts manually or using a computer program like MS Excel.

    t ( s ) x ( m )
    0-12
    1-6
    20
    36
    412
    515
    615
    715
    815
    918
    1024
    1133
    1245
    1360
    1465
    1570
    1675
    1780
    1885
    1990
    2095
    21100
    2290
    2380
    2470
    2570

COLLEGE PHYSICS, Chapter 2, Problem 33QAP , additional homework tip  1

Between t=0 s and t=4 s

  x(t)=12 m(12 m)4 st12 m x(t)=6t12

Between t=4 s and t=5 s

  x(t)=15 m(12 m)1stx(t)=3t

Between t=5 s  and t=8 s

  x(t)=15 m

Between t=8 s and t=13 s, there is a quadratic function.

COLLEGE PHYSICS, Chapter 2, Problem 33QAP , additional homework tip  2

Therefore between t=8 s and t=13 s ;

  x(t)=1.5t222.5t+99

Between t=13 s and t = 21 s ;

COLLEGE PHYSICS, Chapter 2, Problem 33QAP , additional homework tip  3

Therefore between t=13 s and t = 21 s ;

  x(t)=5t5

Between t=21 s and t=24 s

COLLEGE PHYSICS, Chapter 2, Problem 33QAP , additional homework tip  4

Therefore between t=21 s and t=24 s ;

  x(t)=10t+310

Between t=24 s and t=25 s ;

  x(t)=70 m

Conclusion:

Between t=0 s and t=4.5 s ; x(t)=6t12

Between t=4 s and t=5 s ; x(t)=3t

Between t=5 s  and t=8 s ; x(t)=15 m

Between t=8 s and t=13 s ; x(t)=1.5t222.5t+99

Between t=13 s and t = 21 s ; x(t)=5t5

Between t=21 s and t=24 s ; x(t)=10t+310

Between t=24 s and t=25 s ; x(t)=70 m

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COLLEGE PHYSICS

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