Question

solve it, if you can ​

Answer 1

$\mathfrak{\large{\underline{\underline{Given:-}}}}$

The initial velocity of car is (u)= 30 km/ hr or 8.34 m/sec

Time taken to stop = 5 sec.

$\mathfrak{\large{\underline{\underline{To find:-}}}}$

Deacceleration of car = ?

$\mathfrak{\large{\underline{\underline{Solution:-}}}}$

As after applying brakes the car comes to be rest I. e, it's final velocity become 0.

Now,we use equation of motion.

★ $\boxed{\sf\red{a = \frac{v - u}{t} }}$

putting the value,

$\implies$ $\bold{a = \frac{0 - 8.34}{5} }$

$\implies$ $\bold{a = -1.668m/ {s}^{2} }$

The negative sign shows that acceleration is opposite in direction of motion.