Posted by **trina** on Friday, July 26, 2013 at 7:58pm.

During a rain storm, rain comes straight down with velocity Vi =-15 m/s and hits the roof of a car perpendicularly. The mass of the rain per second that strikes the roof is 0.060 kg every second. Assuming that the rain comes to rest upon strikingthe car ( Vf = 0 m/s), find the average force exerted by rain on the roof during a 3 second time interval.

- Physical Science/Physics -
**Devron**, Friday, July 26, 2013 at 9:16pm
F=Ma

F=M(∆V/t)

∆V=Vf-Vi=-15m/s-0m/s=-15m/s

t=3s

m=0.060 kg

Plug and chug

F=(0.060 kg)[(-15m/s)/3s]

- scince -
**drwls**, Saturday, July 27, 2013 at 7:29am
The time interval doesn't matter.

F = (0.060 kg/s)(15 m/s) = 0.90 N

- scince -
**Devron**, Monday, May 12, 2014 at 1:59am
I think that it would: F=ma, and F=mdV

## Answer This Question

## Related Questions

- physical science - During a rain storm, rain comes straight down with a velocity...
- Math - The probability of rain falling on the roof of Adamâ€™s dorm on any given ...
- math urgent - 2 rainstorms occurred in one week in a certain area in the first ...
- math - 2 rainstorms occurred in one week in a certain area. In the first storm, ...
- Maths - a flat rectangualar roof is 20m long and 12m wide. All rain falling on ...
- 6th grade - For every 25 mm of rain falling on the avarage home, 5000 L runs off...
- Maths / Physics - A car is moving along a straight horizontal road at 82 km/h ...
- physics - From inside your apartment, you watch rain fall straight down at a ...
- Physics - During a severe storm in Palm Beach, Fla., on January 2, 1999, 31 ...
- Science-Physics - A car is moving at a constant 19.3m/s, and rain is falling at ...

More Related Questions