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drek231 [11]
3 years ago
7

If an object weighs 80 Newtons, what force must be applied to the rope to raise the object when the mechanical advantage is four

?
Which formula would you use to solve this problem?
Physics
1 answer:
AnnyKZ [126]3 years ago
5 0
80 -4f(45.56 - 56) solve and get answer
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NNADVOKAT [17]

Answer: Their final relative velocity is -0.412 m/s.

Explanation:

According to the law of conservation,

      m_{1}v_{1} + m_{2}v_{2} = (m_{1} + m_{2})v

Putting the given values into the above formula as follows.

      m_{1}v_{1} + m_{2}v_{2} = (m_{1} + m_{2})v

     2.50 \times 10^{3} kg \times 0 m/s + 7.50 \times 10^{3} kg \times -0.550 m/s = (2.50 \times 10^{3} kg + 7.50 \times 10^{3} kg)v

           -4.12 \times 10^{3} kg m/s = (10^{4} kg) v

                   v = \frac{-4.12 \times 10^{3} kg m/s}{10^{4} kg}

                      = -0.412 m/s

Thus, we can conclude that their final relative velocity is -0.412 m/s.

8 0
3 years ago
PLEASE HELP! I'LL GIVE BRAINLEST​
erma4kov [3.2K]

Answer:

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Answer:

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Explanation:

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