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M5 Rotational Motion

The document discusses a physics problem involving a uniform rod and a particle, focusing on the conservation of angular momentum during a collision. It provides a formula to find the distance x in terms of the rod's length a. The review notes that most candidates correctly applied the principle of angular momentum conservation, while some incorrectly attempted to use energy conservation.

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5 views3 pages

M5 Rotational Motion

The document discusses a physics problem involving a uniform rod and a particle, focusing on the conservation of angular momentum during a collision. It provides a formula to find the distance x in terms of the rod's length a. The review notes that most candidates correctly applied the principle of angular momentum conservation, while some incorrectly attempted to use energy conservation.

Uploaded by

mharadzi275
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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M5 Rotational motion PhysicsAndMathsTutor.

com

1. A uniform rod AB, of mass m and length 2a, is free to rotate about a fixed smooth axis which
passes through A and is perpendicular to the rod. The rod has angular speed ω when it strikes a
particle P of mass m and adheres to it. Immediately before the rod strikes P, P is at rest and at a
3
distance x from A. Immediately after the rod strikes P, the angular speed of the rod is ω.
4

Find x in terms of a.
(Total 5 marks)

Edexcel Internal Review 1


M5 Rotational motion PhysicsAndMathsTutor.com

4 4 3
1. ma 2 ω =  ma 2 + mx 2  ω M1A1A1
3 3 4
2
⇒x= a DM1A1 5
3
[5]

Edexcel Internal Review 2


M5 Rotational motion PhysicsAndMathsTutor.com

1. Most candidates realised that angular momentum was conserved. A few, however, tried to
conserve energy despite there having been a collision, and they received no credit.

Edexcel Internal Review 3

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