The Magic Chart Honors Physics Worksheet With Answers - Northern Highlands Page 2
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6Example 2
What about problems that act along a different axis? How does the context of the problem change
A car is at rest when it experiences an acceleration of 2.0m/s
towards the north for 5.0s. How far will it travel during the
2
Take a second to write down the facts in the problem and then determine which equation you would use.
time it accelerates?
Since we’re not told where the car starts, let’s just define its initial position as the origin for this problem, zero. In that
case, the distance it travels will just be its position, x, at the end of the problem. Then,
x
= 0
0
x = ?
v
= 0
o
t= 5.0s
a = 2.0m/s
2
Example 3
x = v
t + ½at
2
o
x = v
t + 1/2 a t
An object accelerates from rest. How long will it take for it to travel 40m if its acceleration is 4m/s
?
v
=0 m/s
40 m = ½ (4 m/s
)t
=20 s
2
2
2
Given
Formula
Set up
Solution
i
a= 4 m/s
i
2
t=?
x=40 m
Example 4
2
A plane must reach a speed of 36m/s in order to take off and its maximum acceleration is 3.0m/s
. How long a runway does
v
= v
+ 2a x
it require?
v
=0 m/s
(36 m/s)
=2(4m/s
)x
=162 m
f 2
i 2
2
2
Given
Formula
Set up
Solution
i
v
=36 m/s
a= 4 m/s
f
2
x=?
2 |
P a g e
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