Question

ways that machines may make work easier include changing the a direction in which force is applied. b distance over which force is applied. c amount of force applied. d any of the above

Explanation:

Machines can change the direction of the applied force (e.g., pulley), the distance over which the force is applied (e.g., lever), and the amount of force applied (e.g., hydraulic lift). So all the options a, b, c are correct.

Answer:

d. any of the above