- #1
rayfish
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Homework Statement
So this was a long question recently given on my exam, and I had only a slight idea of how to do it.
A block of wood is 1.05m above the ground, and there's a ledge supporting it, and its just sitting there. A pendulum that weighs 200g. When it is pulled back, it is 0.73m above the ledge, and when it is pulled back, and released, it hits the block. The pendulum continues after hitting the block to a point where it is 0.25m above the ledge. The block then travels a certain distance (data is displayed below)
This is given information
Height of Pendulum above ledge : 0.73m
Mass of Pendulum: 0.2kg
Mass of Block: 0.085kg
Height of Block above the ground: 1.05m
Height of Pendulum after hitting the block at max height: 0.25m
There is also given data results:
1.7m
1.65
1.57
1.51
1.48
1.47
1.62
And the question was to determine an equation to predict what will happen and compare to the observations that were given. The results should have slight variations, but stay roughly similar. We were told to ignore all friction, and that it is a closed system.
Homework Equations
Gravitational Energy: mgh
Kinetic Energy: 0.5mv^2
Conservation of mass
The Attempt at a Solution
]http://img107.imageshack.us/i/ccf1507200900001.jpg/