Asked by grace
The driver of a 1560 kg automobile traveling at 24 m/s on a leve, paved road hits the brakes to stop for a red light. determine the distance needed to stop the car if the coefficient of friction between the car tires and the road is .80
-one of the steps required of me to obtain the answer is: Apply newtons second law in component form to the situation.
i am at a loss please help me
-one of the steps required of me to obtain the answer is: Apply newtons second law in component form to the situation.
i am at a loss please help me
Answers
Answered by
drwls
"Newton's second law in component form" is just
F = m a in the horizontal direction of motion.
F is the braking force, M*g*Uk
where Uk is the coefficient of kinetic friction.
M*g*Uk = M a means that
a = g*Uk is the acceleration rate.
a*(stopping time) = (initial velocity)
Stopping time = Vo/(g*Uk)
Stopping distance = Avg velocity*(Stopping time)
= Vo^2/(2*g*Uk)
Note that the mass cancels out, and is not needed.
F = m a in the horizontal direction of motion.
F is the braking force, M*g*Uk
where Uk is the coefficient of kinetic friction.
M*g*Uk = M a means that
a = g*Uk is the acceleration rate.
a*(stopping time) = (initial velocity)
Stopping time = Vo/(g*Uk)
Stopping distance = Avg velocity*(Stopping time)
= Vo^2/(2*g*Uk)
Note that the mass cancels out, and is not needed.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.