ESTIMATING DISTANCE

OBJECTIVE: Compute your average stride and you average walking speed and use them to estimate distances.

COMPUTING YOUR AVERAGE STRIDE.
Walk at a normal speed from the two points (100 ft. apart) marked on the sidewalk. Count to the nearest stride. Such as 15 1/2 steps would be 16. Count and record 3 trips then figure your average number of steps and your average step length.

1st trip = ______________
2nd tirp = _____________
3rd trip = ______________
Total = ________________ / 3 = ____________ Average number of steps

To find average step length take the distance traveled (100 feet) and divide it by your average number of steps.

100 / _________Average number of steps = ___________ Average step length


COMPUTING YOUR WALKING SPEED
Walk at a normal speed from the two points (100 ft. apart) marked on the sidewalk. Use a stopwatch to time how long it takes to get from one point to another. Do this for three trips and find the average time to walk the distance.

1st trip = ______________
2nd tirp = _____________
3rd trip = ______________
Total = ________________ / 3 = ____________ Average time
To find the feet per second that you travel, divide 100 feet y the average time and round to the nearest tenth of a foot.

100 / _________Average time = ___________ Average feet per second.

Next calculate your average walking speed in feet per minute by multiplying by 60

____________Feet per second * 60 = _____________feet per minute

ESTIMATE THE FOLLOWING DISTANCES BY COUNTING STEPS...

1. Find the distance from the east door in front of room 13 to the West wall in front of the library. (Round to nearest tenth of a foot)


________Number of steps * _______Average step length = _______Total length


2. Find the distance from the North door in the hallway to the incline part of the hall in front of the office. (Round to nearest tenth of a foot)



________Number of steps * _______Average step length = _______Total length


3. Find the length of the outside of the sidewalk from the doorway at the North end of the middle school, walking South, to the end of the building. (Round to nearest tenth of a foot)


________Number of steps * _______Average step length = _______Total length

ESTIMATE THE FOLLOWING DISTANCE BY USING YOUR AVERAGE WAKING SPEED....

4. From the South end of the building walking North, find the length of the building. (Round to the nearest foot)


________Time in minutes * ___________Average walking speed = _____________Total length