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Alex787 [66]
3 years ago
11

If you have lifted 10 pounds 2 feet, you have done ___ foot-pounds of work.

Physics
1 answer:
nasty-shy [4]3 years ago
8 0
Work = Force x distance
          (10 pounds)(2 feet)
Work = 20 foot-pounds of work

hope this helps :)


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A felt-covered beanbag is fired into a empty wooden crate that sits on a concrete floor and is open on one side. The beanba
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Answer:

31.42383 m/s

Explanation:

g = Acceleration due to gravity = 9.81 m/s²

\mu = Coefficient of kinetic friction = 0.48

s = Displacement = 0.935 m

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m_2 = Mass of empty crate = 3.77 kg

v_1 = Speed of the bean bag

v_2 = Speed of the crate

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a=-\frac{f}{m}\\\Rightarrow a=-\frac{\mu mg}{m}\\\Rightarrow a=-\mu g

a=--9.81\times 0.48=4.7088\ m/s^2

From equation of motion

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In this system the momentum is conserved

m_1v_1=(m_1+m_2)v_2\\\Rightarrow v_1=\frac{(m_1+m_2)v_2}{m_1}\\\Rightarrow u=\frac{(0.354+3.77)\times 2.69739}{0.354}\\\Rightarrow u=31.42383\ m/s

The speed of the bean bag is 31.42383 m/s

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