3. Spring Constant for less stiff spring
Mass of Soda and can: 0.37 kg Force: 3.626 N
Initial Length: 44 mm Final Length: 85 mm
Delta x=41 mm k=F/delta x=0.08844 N/mm
k=88.44 N/m
4. Spring Constant for stiff spring
Mass of Soda and Can: 0.37 kg Force=3.626 N
Initial Length=44 mm Final Length=55 mm
Delta x=11 mm k=F/delta x=0.32964 N/mm
k=329.64 N/m
6. Spring-Eraser Deflection Data
(Used less stiff spring: k=88.44 N/m,
initial length=44 mm)
Points Deflection of eraser (mm) Change in Length of spring (mm) Force of spring (N)
0 0 0 0
1 2 14 1.24
2 3 17 1.5
3 4 18 1.59
4 4 19 1.68
7. Force vs Deflection Curve
Force vs Deflection
1.8
1.6
1.4
1.2
1
Force (N)
0.8
0.6
0.4
0.2
0
0 2 3 4 4
Deflection (mm)
8. Innovation
• Because the screw did
not fit in the
polycarbonate tube, a
rubber piece was glued
and taped to
screw, allowing the tube
to fit over it.
• Also used eraser instead
of toothpick to show
more deflection
