To solve this problem, we must assume that the man
undergoes constant acceleration as he goes down the river (therefore no other forces
must act on him except gravity). Therefore we can use the formula below to
calculate for the duration of his fall:
y = y0 + v0 t + 0.5 a t^2
where y is the distance and y0 = 0 since we set the
reference point at the bridge, v0 is the initial velocity and is also equal to
v0 = 0 since the man started from rest, therefore the equation becomes:
y = 0 + 0 t + 0.5 a t^2
y = 0.5 a t^2
Rewriting in terms of t:
t^2 = 2 y / a
t = sqrt (2y / a)
a is acceleration due to gravity = 9.8 m/s^2
t = sqrt [2 * 23 / 9.8]
t = 2.17 s
Therefore the jump last only about 2.17 seconds.
Answer:
-6
Step-by-step explanation:
Took test
She will pay $139.23 (which is rounded up from $139.2255).
You take the price of the dress, and subtract it from 50 percent off, which gives you $119.995. You then add in the price of the shoes, which gets you to $154.695. You then subtract the 10% off from $154.695, which gets you $139.23 after it's rounded up.
Answer:
The standard error of the mean (SE) is of 0.326lb.
Step-by-step explanation:
The standard error of the mean is given by the following formula:
In which s is the standard deviation of the sample and n is the size of the sample.
In this problem, we have that:
Then
The standard error of the mean (SE) is of 0.326lb.
