A car of mass 1000 kg moves on a circular path with constant speed of 16 m/s. It is turned by 90º after travelling 628 m on the road. The centripetal force acting on the car is-

Options

A. 64 N
B. 3 cm
C. 1.5 cm
D. 1 cm

Answer

B

Explanation

`s=rtheta`
`therefore =(s)/(theta)=(6.28xx100)/((pi)/(2)) `
`r=(2pixx100)/((pi)/(2))=400`
`F=(mv^(2))/(r)=(1000xx16xx16)/(400)=640 N`.