PhysicsMedium65×since 2002Q7829The distance travelled by an object in time ttt is given by s=(2.5)t2s=(2.5) t^{2}s=(2.5)t2. The instantaneous speed of the object at t=5 s\mathrm{t}=5 \mathrm{~s}t=5 s will be:A5 ms−15 \mathrm{~ms}^{-1}5 ms−1B12.5 ms−112.5 \mathrm{~ms}^{-1}12.5 ms−1C62.5 ms−162.5 \mathrm{~ms}^{-1}62.5 ms−1D25 ms−125 \mathrm{~ms}^{-1}25 ms−1Check answerSkip