When a person pedals a bicycle, the front sprocket moves a chain that drives the back wheel and propels the bicycle forward. For each rotation of the front sprocket the chain moves a distance equal to the circumference of the front sprocket. The back sprocket is smaller, so it will simultaneously move through a greater rotation. Furthermore, since the back sprocket is rigidly connected to the back wheel, each rotation of the back sprocket generates a rotation of the wheel. Suppose that the front sprocket of a bicycle has a 4 -in . radius and the back sprocket has a 2 -in . radius. a. How much chain will move with one rotation of the pedals (front sprocket)? b. How many times will the back sprocket turn with one rotation of the pedals? c. How many times will the wheels turn with one rotation of the pedals? d. If the wheels are 27 in . in diameter, how far will the bicycle travel with one rotation of the pedals? e. If the bicyclist pedals 80 rpm , what is the linear speed (in ft/min) of the bicycle? f. If the bicyclist pedals 80 rpm , what is the linear speed (in mph) of the bicycle?
When a person pedals a bicycle, the front sprocket moves a chain that drives the back wheel and propels the bicycle forward. For each rotation of the front sprocket the chain moves a distance equal to the circumference of the front sprocket. The back sprocket is smaller, so it will simultaneously move through a greater rotation. Furthermore, since the back sprocket is rigidly connected to the back wheel, each rotation of the back sprocket generates a rotation of the wheel. Suppose that the front sprocket of a bicycle has a 4 -in . radius and the back sprocket has a 2 -in . radius. a. How much chain will move with one rotation of the pedals (front sprocket)? b. How many times will the back sprocket turn with one rotation of the pedals? c. How many times will the wheels turn with one rotation of the pedals? d. If the wheels are 27 in . in diameter, how far will the bicycle travel with one rotation of the pedals? e. If the bicyclist pedals 80 rpm , what is the linear speed (in ft/min) of the bicycle? f. If the bicyclist pedals 80 rpm , what is the linear speed (in mph) of the bicycle?
When a person pedals a bicycle, the front sprocket moves a chain that drives the back wheel and propels the bicycle forward. For each rotation of the front sprocket the chain moves a distance equal to the circumference of the front sprocket. The back sprocket is smaller, so it will simultaneously move through a greater rotation. Furthermore, since the back sprocket is rigidly connected to the back wheel, each rotation of the back sprocket generates a rotation of the wheel.
Suppose that the front sprocket of a bicycle has a
4
-in
. radius and the back sprocket has a
2
-in
. radius.
a. How much chain will move with one rotation of the pedals (front sprocket)?
b. How many times will the back sprocket turn with one rotation of the pedals?
c. How many times will the wheels turn with one rotation of the pedals?
d. If the wheels are
27
in
.
in diameter, how far will the bicycle travel with one rotation of the pedals?
e. If the bicyclist pedals
80
rpm
, what is the linear speed (in ft/min) of the bicycle?
f. If the bicyclist pedals
80
rpm
, what is the linear speed (in mph) of the bicycle?
Consider the function f(x) = x²-1.
(a) Find the instantaneous rate of change of f(x) at x=1 using the definition of the derivative.
Show all your steps clearly.
(b) Sketch the graph of f(x) around x = 1. Draw the secant line passing through the points on the
graph where x 1 and x->
1+h (for a small positive value of h, illustrate conceptually). Then,
draw the tangent line to the graph at x=1. Explain how the slope of the tangent line relates to the
value you found in part (a).
(c) In a few sentences, explain what the instantaneous rate of change of f(x) at x = 1 represents in
the context of the graph of f(x). How does the rate of change of this function vary at different
points?
1. The graph of ƒ is given. Use the graph to evaluate each of the following values. If a value does not exist,
state that fact.
и
(a) f'(-5)
(b) f'(-3)
(c) f'(0)
(d) f'(5)
2. Find an equation of the tangent line to the graph of y = g(x) at x = 5 if g(5) = −3 and g'(5)
=
4.
-
3. If an equation of the tangent line to the graph of y = f(x) at the point where x 2 is y = 4x — 5, find ƒ(2)
and f'(2).
University Calculus: Early Transcendentals (4th Edition)
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