(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Could I please have a tutor check my answer and solution?

question: An effort of 3 kN is required to move a mass of 2000 kg in a certain simple machine. If the mass is raised 1.5 meters while the effort moves 12 meters, find the efficiency?

2. equations used in solution:

work output = load x distance moved by load

work input = effort x distance moved by effort

efficiency = work output / work input

3kN = 3000 Newtons

3. The attempt at a solution

my solution:

efficiency = work output / work input

mass = 2000 kg =19613.3 Newtons x 1.5 meters /

3000 Newtons x 12 meters

effort = 29419.95 Nm / 353039.4 Nm

= 0.817

Now, is it possible to have such a low efficiency in a machine? What simple machine would this be?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Simple machine efficiency

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