A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?

To find the weight of the pole-vaulter, we need to use the formula for gravitational potential energy:

Potential Energy (PE) = Weight (W) × Height (h)

Given that the change in potential energy (ΔPE) is -3.8E3 J and the height (h) is 5.34 m, we can rearrange the equation to solve for weight:

W = ΔPE ÷ h

Let's substitute the values into the equation to calculate the weight of the pole-vaulter.