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3 years ago

5

A tree limb of mass 12 kg falls straight down. If air resistance exerts 27 N of force on the limb as it falls, what is the net f

orce on the tree limb

2 answers:

Mandarinka [93]3 years ago

8 0

Answer: 91N down

Explanation:

Karolina [17]3 years ago

6 0

The net force is 27 n

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What is the weight in newtons of a 10 kg mass on the earth's<br> surface?

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Answer:

ma = 48.48kg

Explanation:

To find the mass of the astronaut, you first calculate the mass of the chair by using the information about the period of oscillation of the empty chair and the spring constant. You use the following formula:

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mc: mass of the chair

k: spring constant = 600N/m

T: period of oscillation of the chair = 0.9s

You solve the equation (1) for mc, and then you replace the values of the other parameters:

$m_c=\frac{T^2k}{4\pi^2}=\frac{(0.9s)^2(600N/m)}{4\pi^2}=12.31kg$ (2)

Next, you calculate the mass of the chair and astronaut by using the information about the period of the chair when the astronaut is sitting on the chair:

T': period of chair when the astronaut is sitting = 2.0s

M: mass of the astronaut plus mass of the chair = ?

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Finally, the mass of the astronaut is the difference between M and mc (results from (2) and (3)) :

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4 years ago