Question detail

Forces and motion scenario: a gear changes turning effect and rotation speed. Which answer best addresses Uniform acceleration (HT only) and the objective to (HT only) Use v^2 - u^2 = 2as to calculate final velocity when initial velocity, acceleration and distance are known?

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 gear system scenario, apply final velocity to (HT only) Use v^2 - u^2 = 2as to calculate final velocity when initial velocity, acceleration and distance are known while keeping distance versus displacement separate.
B. In the gear system scenario, mix up distance versus displacement and ignore final velocity.
C. Use a general revision statement without applying Uniform acceleration (HT only) to the situation.
D. Choose a different forces topic instead of explaining (HT only) Use v^2 - u^2 = 2as to calculate final velocity when initial velocity, acceleration and distance are known.

Answer

The correct answer is: In the gear system scenario, apply final velocity to (HT only) Use v^2 - u^2 = 2as to calculate final velocity when initial velocity, acceleration and distance are known while keeping distance versus displacement separate.

Explanation

The correct option is In the gear system scenario, apply final velocity to (HT only) Use v^2 - u^2 = 2as to calculate final velocity when initial velocity, acceleration and distance are known while keeping distance versus displacement separate.. It is correct because the scenario says a gear changes turning effect and rotation speed, which must be interpreted through Uniform acceleration (HT only). This directly supports the learning objective to (HT only) Use v^2 - u^2 = 2as to calculate final velocity when initial velocity, acceleration and distance are known. Use values 2, 5, and 17 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 distance versus displacement.

Common mistake

Final Velocity Calculation Mistake

Students often forget to square the initial velocity when using the equation v^2 - u^2 = 2as.

Always ensure to square the initial velocity (u) before performing the calculation.

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