1. Tardigrade
  2. Question
  3. Physics
  4. At a certain time a particle has a speed of 18 m/s in positive x-direction and 2.4 s later its speed was 30 m/s in the opposite direction. What is the magnitude of the average acceleration of the particle during the 2.4 s interval?

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Q. At a certain time a particle has a speed of $18\, m/s$ in positive x-direction and $2.4\, s$ later its speed was $30\, m/s$ in the opposite direction. What is the magnitude of the average acceleration of the particle during the $2.4\, s$ interval?

AMUAMU 2015Motion in a Straight Line

Solution:

Average acceleration $=\frac{\text { change in veloclty }}{\text { Time taken }}$
$=\frac{-30\, m / s -18\, m / s }{2.4}=20\, m / s ^{2}$