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  • The distance travelled by an object in time t is given by . The instantaneous speed of the o

The distance travelled by an object in time t is given by s = (2.5)t^2. The instantaneous speed of the object at t =5 s will be :
 

Option: 1

25 ms-1


Option: 2

12.5 ms-1

 


Option: 3

5 ms-1 


Option: 4

62.5 ms-1


Answers (1)

\mathrm{S}=2.5 \mathrm{t}^2\\ Speed (\mathrm{v})=\frac{\mathrm{ds}}{\mathrm{dt}}=5 \mathrm{t}\\ At, \mathrm{t}=5 \mathrm{sec}.\\ \mathrm{v}=5 \times 5=25 \mathrm{~ms}^{-1}

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Kshitij

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