Question

A car moving on a straight path covers a distance of 1 km due east in 100 s. What is (i) the speed and (ii) the velocity, of car ? ​

Answer 1

Answer:

(i) 10ms -¹

(ii) 10m/s due east

Explanation:

(i) Speed is a scalar quantity. So speed is not expressed with direction.

Distance covered =1km=1000m

Time elapsed =100s

∴ Speed= Distance  /Time

=  100 /1000  ms -¹  

=10ms -¹

(ii) Displacement  =  1 km due east = 1000 m due east

Velocity =   Displacement/time

= 10m/s due east  

Velocity is represented by both magnitude and time.

                   

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