Al Einstein, James Maxwell, Isaac Newton, James Watt
Due Date: July 19, 2008 Cut-Off Date: July 21, 2008
Purpose:To determine if the mass of a falling object affects its acceleration rate.
Hypothesis:The greater the mass of an object, the greater its rate of acceleration because more massive objects have more gravitational force exerted on them by the Earth.
Materials:- 3 spheres of different mass
- spark timer
- spark timer tape
- measuring tape
- recycle bin
Safety: Ensure that the masses fall directly into the recycle bin to avoid them landing on toes and/or injuring team members.
Procedure:Refer to Nelson Physics 11, pp. 561-562.
Notes: 3 spheres were used instead of 3 hooked masses.
A recycle bin was used instead of a safety net.
Observations & Analysis:
Table 1: Experimental Accelerations Due to Gravity for Different Masses Sphere Mass
(kg)Trial #Number of Time IntervalsTotal Time
(m/s/s [D])Average Acceleration
V1 = 0
∆d = 0.860 m [D]
∆t = 0.417 s
a = ?
∆d= V1 (∆t) + ½ a (∆t)2
a= 2(∆d) / (∆t)2
= 2(0.860 m [D]) / (0.417 s)2
= 9.91 m/s/s [D]
a1 = 9.91 m/s/s [D]
a2 = 9.90 m/s/s [D]
a3 = 9.83 m/s/s [D]
aaverage = ?
aaverage = (a1 + a2 + a3 ) / 3
= (9.91 m/s/s [D] + 9.90 m/s/s [D] + 9.83 m/s/s [D]) / 3
= 9.88 m/s/s [D]
= 9.9 m/s/s [D]
Sources of Error:
The results of this laboratory investigation may have been misleading due to:
•the spark timer skipping a mark causing a need to estimate the displacement for...