Three identical magnets P, Q and R are released simultaneously from rest and fall to the ground from the same height - AQA - A-Level Physics - Question 27 - 2019 - Paper 2
Question 27
Three identical magnets P, Q and R are released simultaneously from rest and fall to the ground from the same height.
P falls directly to the ground.
Q falls throu... show full transcript
Worked Solution & Example Answer:Three identical magnets P, Q and R are released simultaneously from rest and fall to the ground from the same height - AQA - A-Level Physics - Question 27 - 2019 - Paper 2
Step 1
A P and R arrive together, followed by Q.
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Answer
When released, P falls directly and experiences no interference.
Q, passing through the conducting ring, will induce a current, experiencing a magnetic drag due to Lenz's law, causing it to fall slower than P.
R, which passes through a ring with a gap, will experience a weaker effect and fall faster than Q, but still slower than P.
Hence, the order is: P and R reach the ground together, followed by Q.
Step 2
B C arrives first, followed by Q which is followed by R.
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Answer
This scenario cannot occur because C (P in this instance) cannot fall slower due to the absence of magnetic interference.
Step 3
C All three magnets arrive simultaneously.
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Answer
This situation is unlikely as each magnet experiences different forces based on their paths.
