Question

part e
set the friction slider to
one\ and the ice will appear again. give the crate a quick push. note that the sum of forces drops down. however, the crate keeps moving. why?
self - evaluation
how did you do? rate your work on a scale of 1 to 5, with 5 as the highest score. then write a brief evaluation of your work below. note what you learned and what challenged you.

Explanation:

This is due to Newton's first - law of motion. An object in motion will stay in motion with a constant velocity unless acted upon by an external force. When the friction is set to none and the crate is pushed, there is no significant opposing force to stop its motion immediately, so it keeps moving.

Answer:

The crate keeps moving because of Newton's first law of motion. In the absence of friction (an external force that would slow it down), an object in motion tends to stay in motion with a constant velocity.