Question

question: this quiz will test your comprehension of the content from module 5. instructions: this quiz consists of 10 multiple - choice questions. this quiz doesnt have a time limit and you can retake it as many times as you would like. click on take the quiz once you are ready to begin. question 5 1 pts which task requires more work? lifting a 50 - kg sack 2 meters lifting a 25 - kg sack 4 meters both require the same more information is needed

Explanation:

Step1: Recall work formula

Work \(W = F\times d\), and force \(F = mg\) (where \(m\) is mass and \(g\) is gravitational - acceleration, \(g\approx9.8m/s^{2}\)). For simplicity, we can compare the product \(m\times d\) for both cases since \(g\) is constant.

Step2: Calculate for first case

For lifting a \(50 - kg\) sack \(2\) meters, \(m_1d_1=50\times2 = 100\) (in \(kg\cdot m\)).

Step3: Calculate for second case

For lifting a \(25 - kg\) sack \(4\) meters, \(m_2d_2=25\times4 = 100\) (in \(kg\cdot m\)).

Answer:

C. both require the same