[问答题]
A particle moves along
c//wx95d 9mq3 5ropzeclwrx-1t6 wm l a
ye 4y0cb*n4t ystraight line such that its velocity, v, $\mathrm{~ms}^{-1}$ , is given by v(t)=5 t $e^{-1.2 t}$ , for t $\geq 0$ .
1. On the grid below, sketch the graph of v , for $0 \leq t \leq 3$ .
2. Find the distance travelled by the particle in the first 3 seconds.
3. Find the maximum velocity of the particle in the first 3 seconds.
