A motor car is travelling 20m/s on a circular road of radius 400 m. If it increases its speed at the rate of `1 m//s^(2)`, then its acceleration will
A motor car is travelling 20m/s on a circular road of radius 400 m. If it increases its speed at the rate of `1 m//s^(2)`, then its acceleration will be
A. `2sqrt2m//s^(2)`
B. `sqrt3m//s^(2)`
C. `sqrt 2 m//s^(2)`
D. `3 sqrt3 m//s^(2)`
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Correct Answer - C
`a_(r)=v^(2)(r)=(20xx20)/(400)=1," "a_(r)=1`
`a_(R)=sqrt(a_(T)^(2)+a_(r)^(2))=sqrt(1+1)=sqrt2`
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