Title: Stair Climbing and Power

Purpose: The purpose of this lab is to predict the factors that affect power; calculate the power developed; define power operationally, interpret force, distance, work and time, and to make and use graphs.

Hypothesis: When the amount of time decreases or the force of the object increases, the power of the work done will increase because power is work divided by time.

Variables

IV: The mass (weight force)

DV: The amount of power (time of work)

Control: The accepted power of a human body climbing a flight of stairs

Constants:

Materials: scale, meter stick, stopwatch

Safety: Be careful running up the stairs.

Procedure: Measure and record the mass of each person in your group using a bathroom scale.  Measure the distance from the floor to the top of the flight of stairs you will climb.  Record it in the data table.  Have each person in your group climb the flight of stairs in a manner that he or she thinks will maximize the power developed.  Use your stopwatch/phone to measure the time it takes for each person to perform the task.  Record it in your data table.