Question

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?
(a) 20 m/s
(b) 10 m/s
(c) 5 m/s
(d) 2.5 m/s​

Answer 1

dear your answer is here in this image 20m/s

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