Question

A train accelerates from 36 km per hour to 54 km per hour in use first one acceleration and second one the distance travelled by car

Answer 1

Given :-

A train accelerates from 36 km per hour to 54 km per hour in 10 second.

To Find :-

1) acceleration

2) the distance traveled by car​

Solution :-

We know that

1 km/h = 5/18 m/s

36 km/h = 36 × 5/18 = 10 m/s

54 km/h = 54 × 5/18 = 15 m/s

Now

①

We know that

a = (v - u)/t

a = (15 - 10)/10

a = 5/10

a = 0.5 m/s²

②

We know that

v² - u² = 2as

(15)² - (10)² = 2(0.5)(s)

225 - 100 = s

125 = s