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stellarik [79]
4 years ago
8

A crane performs 1820 J of work by lifting an object 35 meters. How much force did the crane exert?

Physics
1 answer:
RUDIKE [14]4 years ago
5 0

Answer:

52 N

Explanation:

Given:

Work done= 1820 J, distance= 35 meters Force = ?

Formula for work done

W = F • d

Find F.

F = W / d

Substitute the given into the equation.

F = 1820 J / 35 m

= 52 N

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nignag [31]

Using Newton's second law of motion:

F=ma ;  [ F = force (N: kgm/s^2);m= mass (kg); a = acceleration (m/s^2)


Given:                      Find:                   Formula:                  Solve for m:

F: 2500N                 mass:?                F=ma Eq.1              m=F/a  Eq. 2

a= 200m/s^2  


Solution:

Using Eq.2

m= (2500 kgm/s^2)/ (200m/s^2) = 12.5 kg

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3 years ago
Which element’s atoms have the greatest average number of neutrons?Which element’s atoms have the greatest average number of neu
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7 0
3 years ago
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A car traveling at 7.3 m/s accelerates at the rate of 0.82 m/s2 for an interval of 7.4 s. Find vf.
MArishka [77]
<h2>Final velocity is 13.37 m/s</h2>

Explanation:

We have equation of motion v = u + at

     Initial velocity, u = 7.3 m/s

     Final velocity, v = ?

     Time, t = 7.4 s

     Acceleration,a = 0.82 m/s²

     Substituting

                      v = u + at  

                      v = 7.3 + 0.82 x 7.4

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4 years ago
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Liono4ka [1.6K]

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75 W means 75 joules/sec .

Energy = (75 Joule/sec) x (12 min) x (60 sec/min)

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<em>Energy = 54,000 Joules</em>

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3 years ago
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