A Constant Horizontal Pull Acts on a Sled on a Horizontal

question 4

Multiple Choice

A constant horizontal pull acts on a sled on a horizontal frictionless ice pond.The sled starts from rest.When the pull acts over a distance x,the sled acquires a speed v and a kinetic energy K.If the same pull instead acts over twice this distance:

• A) The sled's speed will be 2v and its kinetic energy will be 2K.
• B) The sled's speed will be 2v and its kinetic energy will be K
• C) The sled's speed will be v and its kinetic energy will be 2K.
• D) The sled's speed will be v and its kinetic energy will be K
• E) The sled's speed will be 4v and its kinetic energy will be 2K.

---

Definitions:

Tradeoff

A scenario in which one characteristic or element is forfeited in exchange for acquiring a different characteristic or element.

Efficiency

The extent to which time, effort, or cost is well used for the intended task or purpose, often with the goal of minimizing waste and maximizing output.

Equality

A state of being equal, especially in status, rights, and opportunities.

Income Redistribution

A policy or process aimed at adjusting the distribution of income among a population to reduce inequality.