Question

On a horizontal road, a car is traveling West at a constant speed of 7.60 m/s After 32 s , it has rounded a corner and is now heading North at a constant speed of 12.9 m/s. What is the magnitude of the car's average acceleration during this 32 s time interval?

Answer #1

Car has turned by 90°

Velocity is vector quantity so substraction of quantity should be done by law of vector addition.

Magnitude of Change in velocity is given by

(Since cos90° =0)

14.97 m/s

Magnitude of average acceleration is given by

= 14.97/32

= 0.468

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