Question

Which speed is greater: 30m/s or 30km/h?
The correct answer is 30m/s. Why can't 30 km/h be the correct one?

class 9. lesson - physics "motion"
no spams

Answer 1

Here is your answer mate..

Answer 2

30 m/s is greater than 30 km/hr.

But why ?

30 m/s means that the object travels 30 metres in one second.

So, in 1 hour (i.e. 60 × 60 = 3600 sec), it will travel

$= 30 \times 3600$

$= 108000 \: m$

$= 108 \: km$

However, with a speed of 30 km/hr, the object will travel only 30 km in 1 hour.

Hence, 30 m/s is a greater speed.