- #1
kirstynl
- 2
- 0
1. if a car is speeding off on a surface of asphault, no slipping tires, estimate static friction for a drag racer that covers the quarter mile in 6 seconds
My attempt:
I made a Free Body Diagram: Weight (W) down wards, Normal force (fn) upwards, and friction static friction to the right (Ffs). ou rteacher set that up for us.
I then tried calculating acceleration.
1320=1/2a6^2
a=18.33 m/s/s i think that answer is completely wrong and then i tried figguring out fn
Fn-W= ma
Fn-mg=18.33m
fn-9.8=18.3
Fn=28.1
But i think you have to divide the Fn by the mass times gravity
but i don't have the mass... so i don'/t know phelp pleasee
My attempt:
I made a Free Body Diagram: Weight (W) down wards, Normal force (fn) upwards, and friction static friction to the right (Ffs). ou rteacher set that up for us.
I then tried calculating acceleration.
1320=1/2a6^2
a=18.33 m/s/s i think that answer is completely wrong and then i tried figguring out fn
Fn-W= ma
Fn-mg=18.33m
fn-9.8=18.3
Fn=28.1
But i think you have to divide the Fn by the mass times gravity
but i don't have the mass... so i don'/t know phelp pleasee