Simulation: Stopping Distance of a Car, Question 1 Stopping Distance of a Car As
ID: 586588 • Letter: S
Question
Simulation: Stopping Distance of a Car, Question 1 Stopping Distance of a Car Assume the acceleration due to gravity has a magnitude of 9.8 m/s'. Predict the answers to the following questions and then use the simulation to verify your predictions. Given the limits on the sliders available to you in the simulation, determine: (a) the minimum stopping distance. (b) the maximum total time required to stop the car For the next two questions use a non-zero reaction time If the speed of the car changes by a factor of 2 how do the following change? (c) By what factor does the distance traveled before braking change? (d) By what factor does the distance traveled after braking change? (a) Number (b) Number (c) Number (d) Number (e) What does increasing the coefficient of friction do? Select all that apply lt decreases the time required to stop. It increases the distance traveled before braking It decreases the distance traveled before braking It increases the time required to stop. O It increases the distance traveled after first applying the brakes. It decreases the distance traveled after first applying the brakes.Explanation / Answer
a)
from the last figure, speed becomes zero at t = 2.2 s
At t=2.2 s, distance travelled = 28 m
Answer: 28 m
b)
time = 2.2 s
Answer: 2.2 s
c)
if v doubles, d will also souble
Answer: 2 times
d)
d = v^2/(2*a)
So, if v doubles, d becomes 4 times
Answer: 4 times