Question

Question #2fad9

Answer 1

This is based on the Impulse-Momentum Theorem

Explanation:

The impulse-momentum theorem states that `m\Deltav=f\Deltat`

In this case, you first need to convert from pounds to kg. So 4004 lbs = 1816.2kg at 2.2lb/kg

Then, `1816.2kg*33m/s=59934.6Ns` (Newton seconds)

This will equal -1650N* `\Deltat`

So, `\frac{59934.6}{-1650}=\Deltat`

You can calculate from there. The force is negative the braking is opposing the motion. Time of course will be positive.