At a certain time a particle had a speed of 19 m/s in the positive x direction,

Question

At a certain time a particle had a speed of 19 m/s in the positive x direction, and2.2 s later its speed was 32 m/s in the opposite direction. What is themagnitude of the average acceleration of the particle during this2.2 s interval?

m/s2
2 in theinitial direction of motion oppositethe initial direction of motion    direction changescontinuously At a certain time a particle had a speed of 19 m/s in the positive x direction, and2.2 s later its speed was 32 m/s in the opposite direction. What is themagnitude of the average acceleration of the particle during this2.2 s interval?

m/s2
2 in theinitial direction of motion oppositethe initial direction of motion    direction changescontinuously 2 in theinitial direction of motion oppositethe initial direction of motion    direction changescontinuously 2

Explanation / Answer

At a certain time a particle had a speed of 19 m/s in the positive x direction, and2.2 s later its speed was 32 m/s in the opposite direction. What is themagnitude of the average acceleration of the particle during this2.2 s interval?

a= -32-19/2.2=-23.18m/sec2
magnitude of the acceleration=23.18m/sec2
opposite the initial direction of motion.

m/s2
2 in the initial direction of motionopposite the initial direction ofmotion     direction changescontinuously 2 in the initial direction of motionopposite the initial direction ofmotion     direction changescontinuously 2

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