Questions
The displacement of a body at any time t after starting is given by s = 15t – 0.4t2 . The velocity of the body will be 7 ms–1 after time:
a
20 s
b
15 s
c
10 s
d
5 s
detailed solution
Correct option is C
v=dsdt=15-0.8t Put v=7ms-1 ⇒t=10sTalk to our academic expert!
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