Question detail

Forces and motion scenario: speed changes over a measured time interval. Which answer best addresses Newton's laws of motion and the objective to calculate mass from resultant force and acceleration?

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 motion

Question

A. In the athlete sprint scenario, apply resultant force to calculate mass from resultant force and acceleration while keeping mass versus weight separate.
B. In the athlete sprint scenario, mix up mass versus weight and ignore resultant force.
C. Use a general revision statement without applying Newton's laws of motion to the situation.
D. Choose a different forces topic instead of explaining calculate mass from resultant force and acceleration.

Answer

The correct answer is: In the athlete sprint scenario, apply resultant force to calculate mass from resultant force and acceleration while keeping mass versus weight separate.

Explanation

The correct option is In the athlete sprint scenario, apply resultant force to calculate mass from resultant force and acceleration while keeping mass versus weight separate.. It is correct because the scenario says speed changes over a measured time interval, which must be interpreted through Newton's laws of motion. This directly supports the learning objective to calculate mass from resultant force and acceleration. Use values 3, 15, and 21 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 mass versus weight.

Common mistake

Common Mistake in Calculating Mass

Students often confuse the formula for calculating mass from resultant force and acceleration, sometimes using the wrong equation or misinterpreting the variables.

To calculate mass, use the formula: mass = resultant force / acceleration. Ensure you correctly identify resultant force in newtons and acceleration in m/s².

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