Answers

2016-04-21T22:32:30+05:30
If any body will run with the speed of light then it's velocity will zero and have a finite speed
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2016-04-21T23:08:10+05:30
Speed is a vector quantity, i.e, it has 2 quantities acting over it. U know speed = Distance/Time. Distance and time are the 2 quantities. But velocity is scalar, i.e, it has 1 quantity, speed9 In a particular Direction.). So, If a car keeps turning, on a circular ground( or any circular place,the velocity would continue to be zero, But it would surely have speed.
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If a body travels in a circular path then after some time it comes back to its starting position and hence displacement is zero and subsequently velocity is also zero but speed is finite as it depends upon the distance travelled. The same happens when a body is thrown vertically upwards
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