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The angular velocity of the second's-han...

The angular velocity of the second's-hand ofa watch is

A

`0.053 rads^-1`

B

`0.210 rads^-1`

C

`0.105 rads^1`

D

`0.42 rads^-1`

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At the highest point of a projectile, the direction of velocity and acceleration are perpendicular to each other.
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