Question

find average speed if object is moving with velocity of 10 and 5m/s​

Answer 1

Answer:

Hi friend .... Hope this will help you

Explanation:

Let’s review the 4 fundamental kinematic equations of motion for constant acceleration (strongly recommend you commit these to memory – they will serve you well):

s = ut + ½at^2 …. (1)

v^2 = u^2 + 2as …. (2)

v = u + at …. (3)

s = (u + v)t/2 …. (4)

where s is distance, u is initial velocity, v is final velocity, a is acceleration and t is time.

In this case, we know u = 10m/s, s = 5m, v = 20m/s

Then from (2):

v^2 = u^2 + 2as

20^2 = 10^2 + 2(5)a

So a = (400 – 100)/10 = 30m/s^2

Then from (3):

v = u + at

20 = 10 + 30t

So t = (20 – 10)/30 = 0.33s