Question

The magnitude of the force involved in a certain collision (measured in newtons) is equal to the change in momentum (measured in kilogram meters/second). What is the time interval of the collision?

Answer 1

Let the mass of the body is m and moving with an acceleration a
It's momentum, if it's initial velocity is u and final velocity is v, is = m(v-u)

According to question
F=∆p
ma=m(v–u)
let this be equation 1

But actually F = ∆p/t

ma = m(v-u)/t
t = m(v-u)/ma = 1 as m(v-u) = ma

So t = 1sec

HOPE IT HELPS...... :-)

Answer 2

force is impulse x time
force =impulse. given
force/impulse is time
so time is equal to one sec