Question

4.
Express each of the following speeds in metre per second.
(a) 72 km per hour (6) 18 km per hour
( 144 km per hour
(c)
L
following speed in km/h.​

Answer 1

Explanation:

Therefore, a) 72 km/h = 72 × 5/18 = 20 m/s. b) 18 km/h = 18 × 5/18 = 5 m/s. c) 144 km/h = 144 × 5/18 = 40 m/s.