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Elevator Lab
194
Transcript
Data Table: Cole's weight change
Lowest weight change
going down
Highest weight
going up
Actual weight
(lbs)
Trial
Calculations
- Initial mass in lbs/ 2.2 = mass in kg
- acceleration= g(initial mass - measured mass) / (initial mass + measured mass)
Acceleration going up:
g(63-68) / (63+68) ---> 9.8(63-68) / (63+ 68) = 0.37m/s^2
Acceleration going down:
g(63-57) / (63+57) ---> 9.8(63-57) / (63+57) = -0.49m/s^2
g(63-58) / (63+58) ---> 9.8(63-58) / (63+58) = -0.40m/s^2
1
125
138
150
125
2
150
138
Elevator Lab
3
150
127
138
Free Body Diagrams
Force of normal
mg= 470N
mg= 617N
Materials
Force of gravity
mg= 617N
mg= 470N
Force of gravity
Procedure
- 2-4 members
- pen/pencil
- bathroom scale
- elevator
- camera/camcorder
(must be able to go 3+ stories)
1. Find a partner/group (each person will take turns being the subject or the data recorder)
2. Locate a bathroom scale
3. Ask permission to use the elevators in the nearest hotel or casino (or any building with 3+ stories).
4. Weigh each group member outside of the elevator and record your findings.
5. Enter the elevator and make sure that the scale reads the same value at rest for each person in the group.
6. Have one person step on the scale, and take the elevator three floors up.
7. As the elevator is traveling upward with the subject standing on the scale, the partner must watch the scale closely to identify and record the highest value observed.
8. Next, take the elevator three floors down as the same subject stands on the scale.
9. As the elevator travels downward, observe and record the lowest reading on the scale.
10. Repeat steps 6-9 for each member of the group. (The floors must stay consistent for each individual)
Conducted by
Hyperphysics Problem
Ashley Spielberger
and
Cole Vigil
Hypothesis
If the occupants of the elevator change floors, then their measured weight will change, because the elevator will cause the occupants to experience a different gravitational force than they normally would.
Purpose
Study Newton's second law and the effects that an elevator has on the forces acting upon the occupants.
Conclusion
- Going up will cause the value on the scale to increase
- Going down causes the value on the scale to decrease
- Our hypothesis was proven correct
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