Question

The velocity of a particle moving with constant
acceleration at an instant t, is 10m/s. After 5 seconds
of that instant the velocity of the particle is 20m/s.
The velocity at 3 second before to is :
(1) 8 m/s
(2) 4 m/s 0 .28
(3) 6 m/s
ne (4) 7 m/s )​

Answer 1

Answer:

Given, initial velocity (u) =10m/s and final velocity (v) =20 m/s and time(5) =5 s

Explanation:

First find acceleration(a).

a=v-u/t

20-10/5

2 m/s²

so, velocity at 3 seconds before or at 2 seconds is 2s×2 m/s²=4m/s

Answer 2

Answer:

write answer is velocity= 4 m/s