a)What is the change in momentum of the car due to the fly?
(b) What is the change of momentum of the fly due to the car?
(c) Approximately how many flies does it take to reduce the car's speed by 1
km/h?A stationary 0.1 g fly encounters the windshield of a 1200 kg automobile traveling at 100 km/h.?
This be a conservation of momentum problem.
So momentum before = momentum after.
first of all, km/h needs to be converted to m/s. I'm gonna do the conversion quickly, and the speed is 27.778
So .1 * 0 + 1200 * 27.778 = (1200 + .1) ( x )
Solve for X = 27.775 m/s.
The new momentum can be found independently using the newfound x.
A) the CHANGE is 3.6 kg m/s
B) the CHANGE is 2.7775 kg m/s
C)
Using the same equation. 1200 * 27.778 = (1200 + x) * (.2777)
And solve for x. I got roughly 118800.96 flies would need to hit your car in order to slow it down 1 km/h.
P.S in the last problem, i changed 1 km/h to m/s.
