Math

QuestionA sled slides down a hill, reaches the level surface and eventually comes to a stop. The fact that the sled ultimately stops is best explained by \qquad a. the presence of an unbalanced force (e.g., friction) can cause a moving object to stop b. an unbalanced force would be required to keep the sled moving forward at constant speed c. the natural tendency of any object is to ultimately stop d. the presence of inertia causes it to stop

Studdy Solution

STEP 1

1. The sled is subject to forces while moving.
2. The sled eventually comes to a stop due to these forces.
3. We need to determine the best explanation for why the sled stops.

STEP 2

1. Identify the forces acting on the sled.
2. Understand the role of these forces in stopping the sled.
3. Determine the correct explanation from the given options.

STEP 3

The sled is subject to gravitational force pulling it down the hill and frictional force opposing its motion on the level surface.

STEP 4

Once the sled reaches the level surface, the gravitational force no longer contributes to its motion. The frictional force becomes the dominant force acting against the sled's motion.

STEP 5

The sled stops because the unbalanced frictional force opposes its motion, gradually reducing its speed to zero.
The correct explanation is:
a. the presence of an unbalanced force (e.g., friction) can cause a moving object to stop

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