question_answer

An object travels north with a velocity of \[10\text{ }m{{s}^{-1}}\]and then speeds up to a velocity of \[25\text{ }m{{s}^{-1}}\]in 5 s. The acceleration of the object in these 5 s is:

A)  \[3\text{ }m{{s}^{-1}}\]in north direction

B)  \[3\text{ }m{{s}^{-2}}\]in north direction

C)  \[\text{15 }m{{s}^{-2}}\] in north direction

D)  \[\text{3 }m{{s}^{-2}}\]in south direction

E)  \[\text{10 }m{{s}^{-2}}\] in north direction