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VICSpecialist MathematicsQuick questions

Unit 4: Mechanics

Quick questions on Mechanics momentum and connected bodies: VCE Specialist Mathematics Unit 4

8short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is equation for the 5 kg5\ \text{kg} mass?
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Its weight 5g5g acts down, tension TT up:
What is equation for the 3 kg3\ \text{kg} mass?
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Tension TT acts up, weight 3g3g down:
What are different tensions?
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With a light string over a smooth pulley the tension is the same throughout.
What are inconsistent positive directions?
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Set up each equation with the actual direction of motion as positive for that body, or signs will conflict.
What is impulse as force alone?
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Impulse is force times time, equal to the change in momentum, not just the force.
What is q1?
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Find the momentum of a 0.5 kg0.5\ \text{kg} object moving at 8 m/s8\ \text{m/s}. [1 mark]
What is q2?
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A constant 6 N6\ \text{N} force acts for 5 s5\ \text{s}. State the impulse. [1 mark]
What is q3?
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For 2 kg2\ \text{kg} and 4 kg4\ \text{kg} masses over a smooth pulley, write the two motion equations. [2 marks]

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