Question

(i)Distinguish between speed and velocity.
(ii) A bus decreases its speed from 80kmh-1 to 60kmh-1 in 5s.Find the acceleration of the bus.​

Answer 1

Answer:

1) Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector.

Answer 2

Explanation:

I) speed = distance/ time

velocity = displacement/ time

ii) u= 80km/h = 22.2 m/ s

V= 60 km/h = 16.6 m/s

t = 5s

a = v-u / t

= 16.6-22.2 / 5

= -5.6 / 5

= -1.12 m/ s^2