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United StatesPhysics C: MechanicsQuick questions

Unit 1: Kinematics

Quick questions on Displacement, velocity and acceleration - AP Physics C: Mechanics Unit 1

2short 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 q1?
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A particle has position x(t)=t36t2+9tx(t) = t^3 - 6t^2 + 9t (SI units). Calculate its velocity at t=0t = 0 and identify the times it is at rest. [3 points]
What is q2?
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A ball is dropped from rest with g=9.8g = 9.8 m/s squared (constant). Calculate its speed after 2.02.0 s. [2 points]

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