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| PAGE: 485 | SET: Exercises | PROBLEM: 35 |
The graph shows that force 
required to move the object 
feet along the 
axis.
(a)
Observe the graph:
The force required to move the object 
feet along the 
axis is 
pounds is 6 pounds.
Work 
done by the force as the object is moved from 
to 
is 
.
Substitutue corresponding values in the work done formula.
The work done to move the object feet along the axis is 
ft-lb.
(b)
Work 
done by the force as the object is moved from 
to 
is 
.
Observe the graph:
The force is a piecewise function.
The value of the function in 
is 
.
Find the value of the function in 
.
Consider the two points 
and 
in 
.
Point -slope form of line equation: 
.
Substitute 
and 
in the formula.
Thus, 
.
The work done to move the object feet along the axis is 
ft-lb.
(c)
.
Observe the graph:
The force required to move the object feet along the axis is 
pounds.
The work done to move the object feet along the axis is ft-lb.
(d)
Observe the graph:
The force required to move the object feet along the axis is 
pounds.
.
Substitutue corresponding values in the work done formula.
ft-lb.
The work done to move the object feet along the axis is 
ft-lb.
(a) The work done to move the object feet along the axis is 
ft-lb.
(b) The work done to move the object feet along the axis is 
ft-lb.
(c) The work done to move the object feet along the axis is ft-lb.
(d) The work done to move the object feet along the axis is 
ft-lb.
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