Newton's Laws Unit Test
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Question
Imagine a scenario in which an animal's force is pushing itself forward 5 N, friction is pushing it 4 N backward, gravity is pushing the animal 10 N down, and the animal is pushing itself 10 N up. Describe the movement of the animal.(1 point)
Responses
It moves forward and upward because those are the greatest net forces.
It moves forward and upward because those are the greatest net forces.
It moves 10 N down and 10 N up as those are the greatest forces acting on the animal.
It moves 10 N down and 10 N up as those are the greatest forces acting on the animal.
It only moves forward because there is a net force forward.
It only moves forward because there is a net force forward.
It moves 29 N forward because that's the net force.
The correct answer is:
It moves forward and upward because those are the greatest net forces.
The correct response is: It moves forward and upward because those are the greatest net forces.
To determine the movement of the animal, we need to analyze the net force acting on it. Net force is the vector sum of all the forces acting on an object.
In this scenario, there are multiple forces acting on the animal:
1. Animal's force pushing itself forward: 5 N
2. Friction pushing it backward: 4 N
3. Gravity pushing the animal down: 10 N
4. Animal pushing itself up: 10 N
To find the net force, we need to calculate the total force in each direction. The forces pushing the animal forward (5 N) and upward (10 N) are opposed by the force of friction pushing it backward (4 N) and gravity pushing it down (10 N).
Net force in the forward direction = Animal's force pushing itself forward (5 N) - Friction pushing it backward (4 N) = 1 N
Net force in the upward direction = Animal pushing itself up (10 N) - Gravity pushing it down (10 N) = 0 N
Since there is a net force of 1 N acting forward, the animal will move forward. However, because the net force in the upward direction is 0 N, the animal will not move upward.
Therefore, the correct response is:
- It only moves forward because there is a net force forward.