Question

a car is travelling at 18m/s accelerates ti 30m/s in 3seconds. what's the acceleration of the car​

Answer 1

$\Large {\underline { \sf {Required \; Solution :}}}$

We have ―

• Initial velocity, u = 18 m/s
• Final velocity, v = 30 m/s
• Time taken, t = 3 seconds

We've been asked to calculate acceleration.

$\qquad \implies\boxed{\red{\sf{ a = \dfrac{v-u}{t} }}}$

• a denotes acceleration
• v denotes final velocity
• u denotes initial velocity
• t denotes time

$\twoheadrightarrow \quad \sf {a = \dfrac{30-18}{3} \; ms^{-2} }$

$\twoheadrightarrow \quad \sf {a =\cancel{ \dfrac{12}{3} \; ms^{-2} }}$

$\twoheadrightarrow \quad \boxed{\red{\sf{ a = 4 \; ms^{-2} }}}$

Therefore, acceleration of the car is 4 m/s².