Question

A force of 6.0 N changes the momentum a moving object by 3.0 kilogram meters per second. How long did the force act on the mass?

Answer 1

`t=0.5s`

Explanation:

The impulse force or impulse is a force exerted during a small, defined interval of time. The change in momentum of an object, `Deltap`, is equal to the impulse, `J`.

`J=int_(t_i)^(t_f)F(t)dt=Deltap`

The average force is then given by:

`J=F_(avg)Deltat`

So, in order to calculate the time interval that the force acted on the object we can rearrange the above equation and solve for `Deltat`.

`Deltat=J/F_(avg)`

`=(3.0(kgm)/s)/(6.0N)`

`=0.5s`