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 $5 s$ ?

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Answer 1 · 2016-04-16T12:52:45

Cannot be answered

$K.E. = k*t$

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

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

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

The kinetic energy of an object with a mass of 1 kg1 kg constantly changes from 126 J126 J to 702 J702 J over 9 s9 s. What is the impulse on the object at 5 s5 s?