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Mechanical power A is a vector quantity - AQA - A-Level Physics - Question 6 - 2020 - Paper 1

Question 6

Mechanical power A is a vector quantity. B is measured in J. C has base units of kg m² s⁻³. D can be calculated from force × distance moved.

Worked Solution & Example Answer:Mechanical power A is a vector quantity - AQA - A-Level Physics - Question 6 - 2020 - Paper 1

Step 1

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Answer

Mechanical power is a scalar quantity, meaning it does not have direction. Therefore, this statement is incorrect.

Step 2

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Answer

Mechanical power is actually measured in watts (W), where 1 W = 1 J/s. Hence, this statement is also incorrect.

Step 3

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Answer

This statement is correct since the SI unit of power (watt) can be expressed in base units as kg m² s⁻³.

Step 4

98%

120 rated

Answer

This statement is incorrect. Power is calculated as work done (force × distance) over time, so the correct formula involves division by time.

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