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A car changes its velocity from 30 ms-1 due east to 25ms-1 due south. Calculate the change in its (a) speed,(b) velocityAns. (a) 5 ms-1, (b) 39 ms-1 |
Answer» <p>The speed would decrease by 5 ms-1. (Speed does not depend on direction).Velocity change must include direction as well:change in velocity = 25 along south - 30 along east.Its magnitude is square root of ( 25 squared + 30 squared) = 39.05 ms-1</p> | |