Brandon4188

08.03.2021 •

Physics

What is the moment from a 4.2 N force at a distance of 5.4 m from the axle? Give your answer in Nm.

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Ответ:

ninatello081017

03.11.2022

Physics

a) 11.76 m/s b) 7.056 m

Explanation:

The described situation is as follows:

An object is dropped from the top of a tower and when measuring the time it takes to reach the ground that turns out to be 0.02 minutes.

This situation is related to free fall, this also means we have constant acceleration, hence the equations we will use are:

$V_{f}=V_{o}+at$ (1)

${V_{f}}^{2}={V_{o}}^{2}+2ad$ (2)

Where:

$V_{f}$ Is the final velocity of the object

$V_{o}=0$ Is the initial velocity of the object (it was dropped)

$a=9.8 m/s^{2}$ is the acceleration due gravity

is the height of the tower

t=0.02min=1.2 s is the time it takes to the object to reach the ground

b) Begining with (1):

$V_{f}=0+at$ (3)

$V_{f}=at=(9.8 m/s^{2})(1.2 s)$ (4)

$V_{f}=11.76 m/s$ (5) This is the final velocity of the object

a) Substituting (5) in (2):

$(11.76 m/s)^{2}=0+2(9.8 m/s^{2})d$ (6)

Clearing :

$d=\frac{(11.76 m/s)^{2}}{2(9.8 m/s^{2})}$ (7)

d=7.056 m (8) This is the height of the tower

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What is the moment from a 4.2 N force at a distance of 5.4 m from the axle? Give your answer in Nm.​