Galileo used his pulse for the measurement of time. measure the time between your heartbeats after sitting quietly for a few minutes to the nearest 0.1 s. you can obtain that level of precision with an ordinary analog clock by counting several pulses and dividing the elapsed time by the number of pulses. speed is the distance you traveled divided by the time that elapsed while you traveled that distance.
a.)predict your unhurried walking speed. count off 10 steps, counting your heartbeats as you walk, to measure your walking speed in paces per beat and test your prediction.
b.)the length of your step contained some uncertainty when you measured it. your measurement of time contains some uncertainty. use these to estimate how much uncertainty there is in your measurement of your walking speed. report your measurement in meters per second and include uncertainty.