I need to find the weight of a person who has mass 71 kg, and is riding an elevator, at different time intervals. The intervals are 1,5, and 9 seconds. I was given a velocity vs time graph, so I'll try to describe as best i can: The graph starts at (0,0), the slope is 4/1, however when it reaches (2,8)- 2 seconds and 8 m/s - it flatlines for about 4 seconds, then the slope changes to -2/1 and stops when it reaches (0,10) - 10 seconds and 0 m/s.
No relevant equations
The Attempt at a Solution
I tried to find the acceleration, which I know is the slope of the graph, then multiplying it by the mass, but obviously that didnt work, also my answer has to have two sig figs, and of my course my attempted answers give me 3 or 4. I think if i could form an equation for the graph and then find the differential, then substitute in the time intervals, that would give me a better number to multiply the mass by