Is this a horribly ambiguous A Level Physics question?

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The discussion centers on the ambiguity and strictness of OCR A level physics exam questions and marking schemes. A private tutor expresses frustration over unclear questions and overly picky answer requirements, particularly regarding terms like "rate" and "acceleration." They highlight a specific example involving an LED's resistance that they believe is poorly worded, leading to potential confusion for students. Participants in the discussion agree on the issues raised and emphasize the need for clearer language in standardized testing to accurately assess students' understanding. The conversation underscores concerns about how exam criteria may not reflect true comprehension of physics concepts.
  • #61
From the OP:
ChrisXenon said:
For example they maintain that the word "rate" implies an increasing quantity, whereas I believe that "rate of pay" simply means how much you get paid. They say that "acceleration" will not do when a body is decelerating whereas I think that "deceleration" is an acceleration with a negative value and that all decelerations are accelerations.
As used in mathematics and physics textbooks, "rate" is a ratio that implies a change in two quantities. A decent mathematics or physics textbook would never use the phrase "rate of pay" unless the problem involved salaries that were increasing or decreasing over time.

With regard to acceleration/deceleration, if an object's velocity is decreasing and the available options describing the situation were these two choices :
a) the object is accelerating,
b) object is decelerating,
the first choice would be wrong.
 
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  • #62
We're now at 62 posts for this thread. Seems like a good place to end it.
Thread closed.

If someone has some information that hasn't already been discussed, contact me or another mentor, and we'll consider reopening the thread.
 
Last edited:
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