Question

7. A car travels first 10 seconds with uniform
acceleration of 2 m/s2 from rest on straight road
and then travels with zero acceleration for next
10 seconds. The average speed of entire journey
47) 20 m/s
(3) 10 m/s
(2) 15 m/s
(4) 5 m/s
.​

Answer 1

Answer:

The answer is 5m/s.

Explanation:

First find the final velocity in each case then,

then putting the formula v^2-u^2=2as

Find the distance in each case.

And then you could easily find the average speed by calculating the total distance travelled and the total time taken.