Question

A car of mass $1000kg$ moves on a circular path with a constant speed of $16m/s$.It is turned by ${90}^{\circ }$ after traveling $628m$ on the side. The centripetal force acting on the car is -

• A. $160N$
• B. $320N$
• C. $640N$
• D. $1280N$

Answer 1

The correct option is C $640N$

$m=1000kgv=16m/s⟹628=r\left(\frac{\pi }{2}\right)⟹r=400$

$\therefore$Centripetal force$=\frac{m{v}^2}{r}=\frac{\left(1000\right)\left(16\right)\left(16\right)}{400}=640N$