An object starting from rest travels 20m in the first 2s and 160m in the next 4s. What will be the velocity after 7s from the start?

Asked by sudip.mondal09 | 20th May, 2021, 10:37: AM

Expert Answer:

Given data:
u = 0 m/s; s = 20 mt = 2 s
We use the formula s = ut + (1/2)at2
Substituting the values, we get
a = 10 m/s2
 
At t = 7 seconds
v = u + a t ,
→ v = 0 + a t
       = 10 x 7 
→ v = 70 m/s

Answered by Shiwani Sawant | 20th May, 2021, 12:22: PM