Question

15km
(a) Define speed. Write its S.I unit.
(b) A car travels at a distance of 15km in 20mins. Find the speed of the car in
(i) Kmh!
(ii) ms
(c) Duane is a good runner. He can run 200m in 25sec. Calculate his speed.
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Answer 1

Answer:

speed refers to the total distance which is travelled in a particular interval of time. S.I unit of speed is m/s. 15/20/60=speed.200/25=8m/s is duance speed

Answer 2

Explanation:

Speed of a body is the distance travelled by it per unit time

The S. i unit of speed is meter per second (m/s)

i) 45km/h

ii) 12.5m/s

C) 8m/s and 28.8km/h