We all know it makes sense to bend one's knees when dropping from a height. Suppose a very silly 70-kg person were instead to drop down from a height of 1.4 m onto the ground and stop stiffly within a distance of only 0.60 cm.Calculate how many times his own weight is the average force his body feels. A)15 B)24 C)2.3 $\times$ 10³ D)6.1 $\times$ 10² E)2.3 $\times$ 10²

Question

Quizplus · Accepted Answer

The average force can be calculated using the work-energy principle. The potential energy lost is converted into work done by the stopping force. The force is calculated as F = (mgh) / d, where m = 70 kg, g = 9.8 m/s², h = 1.4 m, and d = 0.006 m. The force is then divided by the person's weight (mg) to find how many times his weight it is.

We All Know It Makes Sense to Bend One's Knees ×\times×

We All Know It Makes Sense to Bend One's Knees $\times$