A rock climber and a hiker exert the same force as they make their separate way up the same mountain. They both travel the same vertical distance (height) but take different routes. The hiker reaches the top of the mountain before the rock climber. Who did more work, the rock climber or the hiker? Help please! It's a write out response NOT multiple choice!

Rohit is trying to tune an instrument

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

How do we measure or think of speed in the united states?