Which requires more work: lifting a 50kg box vertically for a distance of 2m, or lifting a 25kg box vertically for a distance of 4 meters. How do you know?

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.