Question

The kinetic energy of an object with a mass of `1 kg` constantly changes from `126 J` to `702 J` over `9 s`. What is the impulse on the object at `5 s`?

Answer 1

Cannot be answered

Explanation:

`K.E. = k*t`

`=> v = sqrt((2k)/m) sqrt(t)`

`=> int_i^f m dv = int_t^(t+5) sqrt(k/2m) dt/sqrt(t)`

So to have an absolute value of the impulse, we need to specify which 5s we are talking about.