Question 3
a. Suppose the following data was collected during a 35 mph crash test using a 50% male crash test dummy, which has a mass of about 78 kg. Complete the table:

● Calculate the average change in velocity ( ∆v ) and time (∆t ) for tests with and without seatbelts.
● Calculate the force of each impact on the driver.
● Calculate the average force on the driver with seatbelts and without.

Vehicle Number
Driver Seatbelt Buckled (Y/N)
Crash Test Delta-V (m/s) ∆v
Crash Pulse Time (S) ∆t
Force of Impact (N) F=m ∆ v/∆ t

1
N
11.4
0.117
(BLANK)

2
N
16.0
0.101
(BLANK)

3
N
14.9
0.094
(BLANK)

4
N
16.4
0.104
(BLANK)

5
N
17.0
0.101
(BLANK)


AVERAGE:

1
Y
16.1
0.127
(BLANK)


2
Y
14.4
0.125
(BLANK)

3
Y
14.0
0.112
(BLANK)

4
Y
15.2
0.105
(BLANK)

5
Y
15.6
0.123
(BLANK)
AVERAGE:

b. Describe any patterns you notice in the data you calculated. What would you expect to see during the slow-motion replay of each crash? How would the videos with and without seatbelts be different?