Question

Can a body have accleration without change in magnitude of velocity ? Explain with example.

Answer 1

YES .....

a body can have acceleration without changing in the magnitude of velocity

acceleration=velocity/time

here both acceleration and velocity are vector quantity... i.e. have both direction and magnitude.... so even though magnitude of velocity remains constant...we can have a situation where only direction of velocity changes....

EXAMPLE
a body moving in uniform circular motion... magnitude of velocity remains same but as direction of velocity changes (tangent to the circle) => acceleration also changes... here ... in this case.... Acceleration will be perpendicular to velocity vector.....

hope it helps you...
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