Question

Questions number 5 please solve it fast

Answer 1

Answer:

2 sec and 0 sec

Explanation:

According to the given question,

v = final velocity = 2t^2 × e^-t

a = acceleration and t = time

And we are asked to find the time at which acceleration becomes zero.

So, we know that dv/dt = acceleration

So we just have to find dv/dt and put dv/dt = 0 to get the ans.

So, dv/dt = a = 0 putting

we get t = 2 sec or 0 sec ans.

As t^2 = 2t (satisfy both 0 and 2.)

• t^2 - 2t = 0

• t(t-2) = 0

• (t-0)(t-2) = 0

so, t = 0 and 2 sec ans.