Question

A car is travelling at 30 m/s on a circular road of radius 300m. It is increasing its speed at the rate of $4m/s^2$. The acceleration of the car is .................

• A. $3m/s^2$
• B. $4m/s^2$
• C. $5m/s^2$
• D. $1m/s^2$

Answer 1

The correct option is C $5m/s^2$

Centripetal acceleation $=\frac{v^2}{r}$

$a_c=\frac{{30}^2}{300}$

$a_c=3$

$a_{net}=\sqrt{3^2+4^2}$

$a_{net}=5m/s^2$