1.

For the previous question, the acceleration of the particle at any time `t` is `:`A. `-0.8m//s^(2)`B. `0.8m//s^(2)`C. `-0.6m//s^(2)`D. `0.5m//s^(2)`

Answer» Correct Answer - A
`(ds)/(dt)=15-0.8t=7=v`
`8=0.8t,t=10`second.
`a=(d^(2)s)/(dt^(2))=-0.8m//s^(2)`


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