Course Activity: Investigating Forces and Motion task 4
part F In the data table, distance is measured in meters and time is in seconds. Calculate the man’s average velocity using the equation average velocity=total distance/total time

part G Because the man is slowing down, his velocity decreases over time. Use the final and starting velocities in the data table to calculate his average acceleration. Use the equation ax=vx-ux/t , where t is time, ux is initial velocity, vx is final velocity, and ax is acceleration. Use time t = 2.2 seconds, which is calculated using values from the table (2.4 − 0.2).
Part H
The mass of the man is 86 kg. What is the force of friction that slowed him down? Use the equation for Newton’s second law, F = ma.
Part I
Compare the motion of the boy and the man. Who was going faster? Was their acceleration about the same? Who had more frictional force? What might have caused the difference in frictional force