Question

Physical Science Group Report Assignment Overview Reaction time has implications in many day to day activities 1. Work with your group to analyze reaction time data you and each member of your group should have uploaded separately to your group space. Use this information to determine the average human reaction time of your group members Report the value of overall average reaction time you determine here: Stopping distance is an important safety considerations related to driving. 2. Working with your group members, do some research to find out what a typical maximum value of deceleration would be for an average modern car (with anti-lock brakes) that is experiencing braking at an initial typical speed 50 mph) in normal, dry driving conditions. (Remember, "deceleration" is just acceleration that corresponds to sla down instead of speeding up, often assigned a negative value.) Report a value you determine to use for this deceleration value (in m/s'), and cite references that you used to he determine this "typical" value you choose to use HERE: 3.. Reaction time and initial speed both play an important role in the distance required to stop an automobile Use the automobile deceleration value above with the reaction time data from part 1 of this project to fill in the below, which will show how stopping distance varies with different initial speeds. Assume the speed during the reaction time interval is the constant initial speed "Use your experience with the constant acceleration equations from Chapter 2 to calculate the distance travel stopping (braking with the deceleration, or negative acceleration.) You may find it helpful to look at the "Kine Extra help video clips" in this module and the Notes there. Notice that the total distance is to be reported in feet as well as in meters Initial Speed Reaction Time Distance Traveled Distance Traveled Total Stopping Total S Distan Feet) While During While Stopping Distance in Reaction Time Seconds) (Meters) Meters Meters) 0Mph (17.9 m/s) 60Mph (26.8m/s)

Answer 1

Solution:

This is a driving group activity. Do this activity with your group members. The activity is simple:

1.Each of your group members will be driving at a particular speed

2.Their reaction times need to be found out

3.When a certain velocity is reached which is found out in the speedometer, the driver tries not to accelerate further

4.The group members try to calculate the extra distace travelled by the driver.

5. By calculating the speed and the extra distance travelled, the group members can calculate their individual reaction times.

6.By averaging the values of the reaction times, one can calculate the averge reaction time of a person.

Below is an example of the same:

Sl.No.	Speed (m/s)	Stopping Distance(m)	Reaction Time(s)
1	10	2.5	0.250
2	15	3.8	0.253
3	20	5.2	0.260

The average Reaction time is : (0.25+0.253+0.260)/3 =0.254s