Astudent is working in a lab to determine how time affects impulse. the student keeps the force the same in each trial but changes the impact time. some data is shown.

Trail 3

Explanation:

As we know by Newton's II law that rate of change in momentum is always net force applied on the object.

Here we know that

now we also know that change in momentum is known as impulse

so here impulse and force relation is given as

so here in order to find the greatest impulse we need to find the product of force and time to be the maximum as per above formula

so we have

trail 1

impulse = 500 (0.25) = 125 Ns

trial 2

impulse = 500(0.15) = 75 Ns

trial 3

impulse = 500(0.45) = 225 Ns

trial 4

impulse = 500(0.33) = 165 Ns

so out of the four trials maximum impulse is for trial 3