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How much work does it take to raise a #7 kg # weight #28 m #?

Answer 1

Nora Arzate

Work#=1920.8J#

Data:-

Mass#=m=7kg# Height#=#displacement#=h=28m# Work#=??#

Sol:- Let #W# be the weight of the given mass. W=mg=7*9.8=68.6N

Work#=#force*displacement#=W*h=68.6*28=1920.8J# #implies# Work#=1920.8J#

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Answer 2

Adrian Ayala

Work done = force * distance

In this case, the force required to raise the weight is equal to its weight, which is given by:

Force = mass * gravity

Substituting the values: Force = 7 kg * 9.8 m/s^2 = 68.6 N

Now, use the formula for work done: Work done = force * distance

Work done = 68.6 N * 28 m = 1914.8 J

So, it takes approximately 1914.8 joules of work to raise a 7 kg weight 28 meters.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.