Question

As Exercise 6.4
onvert the following speeds into m/sec :
(i) 72 km/h (ii) 9 km/h
(iii) 1.2 km/minute
(iv) 600 m/hour​

Answer 1

Note:

To convert Km/h into m/s,

Just multiply with, 5/18

Solution:

(i) 72 km/h

$72 \times \dfrac{5}{18} = 20 m{s}^{-1}$

(ii) 9km/h

$9 \times \dfrac{5}{18} = 2.5 m{s}^{-1}$

Just try out the remaining 2 questions!

:)

Answer 2

Answer:

1) 72x5/18=20m/sec

2) 9x5/I8=2.5m/sec

3) 1.2 x 1000/60=20 m/see

4) 600/36oo = I/6m/sec