CBSE Class 9 Answered
An object starting from rest Travels 20 m in first 2 seconds and 160 m in next 4 seconds. what will be the velocity after 7 seconds?
Asked by Moinuddin | 04 Oct, 2017, 07:17: PM
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 Yashvanti Jain | 05 Oct, 2017, 11:02: AM
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