1.

The velocity of a block of mass `2kg` moving along `x-` axis at any time `t` is givne by `v=20-10t(m//s)` where `t` is in seconds and `v` is in `m//s`. At time `t=0`, the block is moving in positive `x-` direction. The Kinetic energy of block at `t=3 sec.` is `:`A. `50J`B. `100J`C. `200J`D. `300J`

Answer» Correct Answer - B
From solution of `37 K_(f)=100J Ans.`


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