You're driving down the highway late one night at 20 m/s when a deer steps onto the road 35m in front of you. Your reaction time before stepping on the brakes is 0.5s and the maximum deceleration of your car is 10m/s^2.
How much distance is between you and the deer when you come to a stop?
2007-10-06 13:50:51 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
find the distance you cover during the reaction time
x = vt
x = 20 * .5
x = 10m
find the distance you cover while decelerating
Vf^2 = 2ad + Vi^2
when you stop, your final veloicty is 0m/s
0^2 = 2(-10)d + 20^2
-400 = -20d
d = 20
so the total distance is 20 + 10 = 30m
the deer was initial 35m ahead of you, you travel 30m, so there is 5m between you and the deer when you stop
2007-10-06 13:56:41 · answer #1 · answered by 7 · 0⤊ 0⤋
real take care of what you do.
in USA they dont have psyk. hospitals only prisons
take care of the police and use a bicycle
2007-10-06 13:53:45 · answer #2 · answered by jette n 3 · 0⤊ 0⤋
Crash- bang Whallop- Huh!, l didnt stop. love Jo xx
2007-10-06 13:54:00 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Sorry I can't help you, but I do know of someone who can...... not on here anymore.
2007-10-06 13:53:32 · answer #4 · answered by ? 6 · 0⤊ 1⤋
NOT ENOUGH !
2007-10-06 13:54:26 · answer #5 · answered by Alan S 1 · 0⤊ 0⤋