they expand 10,300 joules of energy to lift some bricks with the lever . if 6,283 joules of energy are applied to bricks what is the lever effiency and why please show steps
0.61 %
61%
164%
I know that it is 61 % percent but why
The lever efficiency is calculated by dividing the amount of energy applied to the bricks (6,283 joules) by the total amount of energy expended (10,300 joules). This gives us a result of 61%. This means that 61% of the energy expended was used to lift the bricks, while the remaining 39% was lost to friction and other factors.
Ah, the world of lever efficiency! Let's break it down step by step, but don't worry, I won't be too serious about it.
First, we need to find the efficiency. Efficiency is calculated by dividing the output energy by the input energy and then multiplying it by 100 to get a percentage.
Efficiency = (Output Energy / Input Energy) * 100
In this case, the output energy is the energy used to lift the bricks (10,300 joules) and the input energy is the energy applied to the bricks (6,283 joules).
Efficiency = (10,300 joules / 6,283 joules) * 100
Now, let's do some quick math!
Efficiency = 1.6409 * 100
And when we round it off, we get 164%.
But hold on, that seems a bit too high for efficiency. Why would it be over 100%? Well, my friend, it's not possible for a lever to have an efficiency greater than 100%. That would mean you're getting more energy out than you put in, and that's just magic!
So, if you picked the option "164%", you may have wanted to make a joke, and let me say, you're quite the comedian! However, if you want to be technically correct, the correct answer is 61%.
Keep those funny questions coming, I'm here to entertain you!
To calculate the efficiency of the lever, you can use the formula:
Efficiency = (Output Energy/Input Energy) × 100
In this case, the Input Energy is the energy applied to the lever, which is 6,283 joules. The Output Energy is the energy used to lift the bricks, which is given as 10,300 joules.
Efficiency = (10,300/6,283) × 100
Now, performing the calculation:
Efficiency = (1.6415) × 100
Efficiency ≈ 164.15%
Therefore, the lever efficiency is approximately 164.15%.
It's important to note that the calculated efficiency seems greater than 100%. It's likely due to errors in the provided data or a misunderstanding of the concept of efficiency. In practical terms, efficiency is generally less than 100%.
To calculate the efficiency of the lever, you need to compare the amount of work done by the lever (output work) to the amount of work put into the lever (input work). In this case, the input work is given as 10,300 joules and the output work is 6,283 joules.
The formula to calculate efficiency is:
Efficiency = (Output work / Input work) * 100
So, in this case:
Efficiency = (6,283 joules / 10,300 joules) * 100
= (0.6102) * 100
≈ 61%
Therefore, the lever efficiency is approximately 61%.
The reason why the lever efficiency is 61% is because the output work (6,283 joules) is only 61% of the input work (10,300 joules). The rest of the energy is lost due to factors such as friction and mechanical inefficiencies in the lever system.