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A uniform piece of card in the shape of the letter L is suspended freely from a horizontal pin - AQA - A-Level Physics - Question 22 - 2021 - Paper 1
Question 22
A uniform piece of card in the shape of the letter L is suspended freely from a horizontal pin. A plumb line is also suspended from the pin. The diagram shows the ca... show full transcript
Worked Solution & Example Answer:A uniform piece of card in the shape of the letter L is suspended freely from a horizontal pin - AQA - A-Level Physics - Question 22 - 2021 - Paper 1
Step 1
What is the position of the centre of mass of the piece of card?
Answer
The center of mass of an object is the point where its mass is evenly distributed. Given that the piece of card is shaped like the letter 'L', we need to consider the geometric symmetry of the shape.
In an 'L' shape, the center of mass lies towards the interior section where the two arms of the letter meet. This is typically somewhere at the intersection of the two segments of the 'L'. Since the question asks for a position among options A, B, C, and D, we refer to the diagram provided (not shown here).
By analyzing the options with respect to the depicted positions, the correct position of the center of mass will be the one closest to the intersection of the two arms of the 'L'. According to the marking scheme, the correct answer is C.