Finding distance/work if only given mass and force?

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SUMMARY

The discussion centers on a physics problem involving an 80 kg concrete block and a 700 N upward force. The participant concludes that the block cannot be lifted because the gravitational force acting on it is 784 N, which exceeds the applied force. Consequently, the maximum height achieved is zero, as the force applied is insufficient to overcome the weight of the block. The relevant equations discussed include Work = Force * Distance and F = ma.

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  • Understanding of Newton's Second Law (F = ma)
  • Knowledge of gravitational force calculation (F = m * g)
  • Familiarity with the concept of work in physics (Work = Force * Distance)
  • Basic algebra skills for solving equations
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This discussion is beneficial for physics students, educators, and anyone interested in understanding the mechanics of forces and work in real-world applications.

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Homework Statement


You try to lift a block of concrete that has a mass of 80 kg, and you end up producing 700 N of upward force on the block. You do not have any help from levers or pulleys or other machines. How high (if at all) did you manage to lift the block?


Homework Equations


Work=Force * Distance or F=ma


The Attempt at a Solution


I tried assuming that t=1 since I wasn't given time so I tried solving for acceleration and ended up with 4 meters being lifted up. I don't know how to solve for work either since I need the number of meters to solve for it (1 N*m=1 J).
 
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I think the answer is zero.
For, the Earth attracts it with a force that is equal to = m*g =80*9.8=784 N
Since the max force is 700 N, I think the block can't be lifted.
 

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