Station 2
At station 2, there was a ramp that was supported by books. The number of books ranged from zero to three. About halfway down the ramp, there was a force plate that had a device hooked up to it to measure the normal force acting on the force plate. With three books supporting the ramp, our measurements included the angle of the ramp being 7°, the force exerted on the plate (by a 2 kg mass) was 19.8N, and the height of the ramp at the tallest was 16 cm. The free body diagram had three forces, the Normal force of the ramp on the mass, the gravitational force of the earth on the mass, and the frictional force of the ramp on the mass. These three forces, when added together, equalled zero, meaning that the velocity was constant, and zero.
Monday, November 9, 2009
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1 comments:
if the mass was sliding down the force plate at a constant velocity, would the forces add together to zero? It seems to me like the frictional force would increase and unbalance the forces.
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