Question detail

Forces and their interactions scenario: a gear changes turning effect and rotation speed. Which answer best addresses Resultant forces and the objective to explain that a non-zero resultant force can change an object's motion?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Forces and their interactions

Question

A. In the gear system scenario, apply resultant force to explain that a non-zero resultant force can change an object's motion while keeping resultant force versus balanced forces separate.
B. In the gear system scenario, mix up resultant force versus balanced forces and ignore resultant force.
C. Use a general revision statement without applying Resultant forces to the situation.
D. Choose a different forces topic instead of explaining explain that a non-zero resultant force can change an object's motion.

Answer

The correct answer is: In the gear system scenario, apply resultant force to explain that a non-zero resultant force can change an object's motion while keeping resultant force versus balanced forces separate.

Explanation

The correct option is In the gear system scenario, apply resultant force to explain that a non-zero resultant force can change an object's motion while keeping resultant force versus balanced forces separate.. It is correct because the scenario says a gear changes turning effect and rotation speed, which must be interpreted through Resultant forces. This directly supports the learning objective to explain that a non-zero resultant force can change an object's motion. Use values 3, 7, and 15 only if the question asks for a calculation. The answer earns credit by naming the relevant force or motion quantity, using units when needed, and avoiding the boundary error resultant force versus balanced forces.

Common mistake

Misunderstanding Resultant Forces

Students often think that a non-zero resultant force only affects the speed of an object, ignoring changes in direction.

Emphasize that a non-zero resultant force can cause both a change in speed and a change in direction of an object's motion.

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