A stationary 0.1 g fly encounters the windshield of a 1400 kg automobile traveling at 100 km/h.
(a) What is the change in momentum of the car due to the fly?
kg 路 km/h opposite the car's motion
(b) What is the change of momentum of the fly due to the car?
kg 路 km/h along the car's velocity
(c) Approximately how many flies does it take to reduce the car's speed by 1 km/h?
flies
How do i solve these problems? I am terrible at this stuff and hopefully i can get the answer step by step. thanksPhysics- A stationary 0.1 g fly encounters the windshield of a 1400 kg automobile traveling at 100 km/h.?
(a) Momentum b4 collision = Momentum after collision
mass (fly) x velocity + mass (car) x velocity = combined mass x combined velocity
(0.1g x 0m/s) + (1400000g x 100000m/s) = 1400000.1g x final velocity)
Its now up to you to finish it as I dont a calcualtor with me!!Just find the final velocity ( remember I used every measurement in metres and grams!!)
(b) Take the momentum it had before the collision which is 0gm/s
Take the final velocity in (a) and multiply it by the mass of the fly whereby you'll get the final momentum...
Find the difference between the two which will equal the final momentum anyway as we are starting with no momentum...
(c) Intorduce y to be the no. of flies....
[(0.1g x y) x 0m/s] + (1400000g x 100000m/s) = [1400000 + (0.1g x y)] x final velocity in (a)
Hence solve for y......
I could have done more to help but I cant bcoz I dont have a calculator with me!!Physics- A stationary 0.1 g fly encounters the windshield of a 1400 kg automobile traveling at 100 km/h.?
And the last thing that goes through its mind is its rectum.
