Fairly easy acceleration problem stumping me

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Homework Help Overview

The discussion revolves around calculating the force required to bring a moving object to rest, specifically focusing on an object with a mass of 900 kg and an initial speed of 20 m/s, brought to rest in 0.1 seconds.

Discussion Character

  • Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants discuss the calculation of force using the formula F = M x A, with one participant attempting to find acceleration by dividing speed by time.

Discussion Status

The discussion includes attempts to calculate the force, with one participant initially providing an incorrect answer due to a miscalculation. Another participant questions the accuracy of the zeros in the initial response, leading to a correction of the force value.

Contextual Notes

There is a focus on ensuring the calculations are accurate, with specific attention to the values used in the calculations and the implications of those values on the final answer.

alpinecg
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1.Calculate the amount of force required to bring to rest an object of 900 Kg mass that moves with a speed of 20 m/s. The moving object is brought to rest in a time equal
to 0.1 s. Provide your answer in both N and KN units.



i think to solve this i just need to find force F=M x A



3. I divided 20m/s by the time interval of 0.1s to get acceleration then timed it by the mass of 900kg. the answer i got is 1,800,000N or 1800KN
 
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Are not there too many 0-s?

ehild
 
ah yes i times the 0.1 by 200m/s not 20m/s so the answer would be 180,000N or 180KN
 
Correct:smile:

ehild
 

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