Question

Calculate the change in time for each quarter of the track. Record the change in time in Table C of your Student Guide.

The change in time for the first quarter is
seconds.

The change in time for the second quarter is
seconds.

The change in time for the third quarter is
seconds.

The change in time for the fourth quarter is
seconds.

Answer 1

I don’t have your recorded times, so I can’t fill the four numbers for you. Here’s how to get them — and if you paste your five time readings I’ll compute them.

Method:
- Let t0 be the time at the start (0 quarter), t1 at 1/4, t2 at 1/2, t3 at 3/4, t4 at the finish (4/4).
- Change in time for each quarter = consecutive difference:
- 1st quarter: Δt1 = t1 − t0
- 2nd quarter: Δt2 = t2 − t1
- 3rd quarter: Δt3 = t3 − t2
- 4th quarter: Δt4 = t4 − t3

Example:
- If t0 = 0.00 s, t1 = 2.15 s, t2 = 4.40 s, t3 = 6.80 s, t4 = 9.50 s, then
- Δt1 = 2.15 − 0.00 = 2.15 s
- Δt2 = 4.40 − 2.15 = 2.25 s
- Δt3 = 6.80 − 4.40 = 2.40 s
- Δt4 = 9.50 − 6.80 = 2.70 s

Paste your t0–t4 values (or the times at each quarter) and I’ll compute the four Δt’s for Table C.