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3 Mechanics

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Question 140

A particle has velocity v=7t−t2v=7t-t^2v=7t−t2 for 0≤t≤50\leq t\leq50≤t≤5, and v=20−2tv=20-2tv=20−2t for t>5t>5t>5, where v v\,v is measured in m s−1\text{m s}^{-1}m s−1.

a.

Find the acceleration at t=4t=4t=4.

[2]
b.

Find the total distance travelled during the first 10 seconds.

[5]
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3 Mechanics Questions

  1. A Level
  2. /Maths
  3. /3 Mechanics

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