Question

a car accelerates unifromly from 18 km/h to 36 km/h in 5s calculate the acceleration

Answer 1

Initial velocity = 18 km/h
= 18 * 5/18
=5m/s.
Final velocity= 36 km/h
= 36 * 5/18
= 10m/s.
Acceleration = v - u / t.
= 10 - 5 / 5
= 5/5
= 1 m/s^2

Answer 2

Answer:

Explanation:

Acceleration=(final velocity-initial velocity)/time.

So, a = (v-u) / t.

According to the question,

v=36km/h

u=18km/h

t= 5 s

=> v-u= 36 - 18 = 18;

=>a= 18/5 km/h

So, let us convert this ans into m/s

for that we can use this formula to convert km/h into m/s

i.e., to multiply by  5/18

so,18/5*5/18=1 m/s^-2

Here, 1 m/s is the ans   because 18 and 5 gets cancelled .

(hope that this answer is useful to you and its error-free.if errors pls correct it.)