Ann is driving down a street at 61 km/h. Suddenly a child runs into the street.
If it takes Ann 0.724 s to react and apply
the brakes, how far will she have moved before
she begins to slow down?
Answer in units of m.

12.267 seconds approximately.

Explanation:

The units can be simplified into m/s, in which case you would have 61000/3600. Simplify that to 16 and 17/18. This is your meters per second, so multiply that by .724 to get the answer.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000