EstoMax

11-13-2003, 10:13 PM

ok.. i have a takehome physics test and the last problem is.. Design your own problem.. so i wanted to make mine kinda interesting and hard.. something we havent done in class anyway.

so this is what i did..

A racecar on a cosmic raceway[no air resistance, we dont know how to calculate that in yet] is slowing down and has 2 seconds to go from 75 to 25 meters per second. The coefficient of friction between the car and the track is 0.980. The car weighs 500kg. The gravity on the planet is same as on earth (9.81). The slope of the straight part of the track is 8 degrees from the horizontal.

i posted the pic too :

this is what you have to do:

Find Force Applied on the X plane

Find Force Applied on the Y plane

Find Force Kinetic

ill post my calculations in next reply

edit: noticed that i had only 2 significant figures which would skew the answers too much. so i changed the coefficient of friction to 0.980 so it would be 3, it doesnt change the answers though.

so this is what i did..

A racecar on a cosmic raceway[no air resistance, we dont know how to calculate that in yet] is slowing down and has 2 seconds to go from 75 to 25 meters per second. The coefficient of friction between the car and the track is 0.980. The car weighs 500kg. The gravity on the planet is same as on earth (9.81). The slope of the straight part of the track is 8 degrees from the horizontal.

i posted the pic too :

this is what you have to do:

Find Force Applied on the X plane

Find Force Applied on the Y plane

Find Force Kinetic

ill post my calculations in next reply

edit: noticed that i had only 2 significant figures which would skew the answers too much. so i changed the coefficient of friction to 0.980 so it would be 3, it doesnt change the answers though.