Question

a bus accelerates uniformly from rest and acquires a speed of 72kmph in 20 sec find acceleration

Answer 1

Hi...☺

Here is your answer...✌

GIVEN THAT,

Initial velocity , u = 0 m/s

Final velocity

v = 72 km /h

v = 72 × 5 / 18 m/s

v = 4 × 5 m/s

v = 20 m/s

Also given that

Time taken , t = 20 s

Now,

We know that,

Acceleration

$a = \frac{v - u}{t} \\ \\ a = \frac{20 \: - 0}{20} \: m/ {s}^{2} \\ \\ a = 1 \: m/ {s}^{2}$

HENCE,

The acceleration of bus was 1 m/s²

Answer 2

Answer:

Explanation:

U=0

V=72km/h=72×5/18

=20m/s

A=v/t=20/20

A=1