Question

machines help us to do work. a machine is a device that makes work easier. it does this by changing the direction of the force, changing the amount of force, or changing the distance over which the force is being spread. work is defined mathematically as force times distance.

the ladder on this playground requires you to use more force because the force is spread over a shorter distance. this makes it more difficult than using the slides.

choose the correct answer.
why does climbing a ladder require more effort than walking up stairs?

a ladder requires a small force for a short time.
a ladder requires a small force over a long distance.
a ladder requires a large force over a short distance.

Explanation:

The text explains that a ladder requires more force as the force is spread over a shorter distance. Among the options, "A ladder requires a large force over a short distance" matches this explanation. The other options (small force for short time, small force over long distance) do not align with the given reasoning about force and distance for a ladder.

Answer:

C. A ladder requires a large force over a short distance. (Note: Assuming the third option is labeled C; if the options were A, B, C with the third being the correct one, this is the answer. If the original options had different labels, adjust accordingly based on the position, but from the content, the third option text is the correct one.)