I) A ground. Use conservation of mechanical object was dropped. 20 kg object is

Question

I) A ground. Use conservation of mechanical object was dropped. 20 kg object is dropped from a certain height and achieves a speed of 38m/s before striking the I energy to determine the height above the ground that the 2) A glider sits at the top of an air track that has been inclined. The glider has a mass of 250 g and is 35 cm vertically from the surface of the table. Once released, the glider accelerates down and passes through a photogate. At the photogate, the glider is 23 cm above the table top. What is the velocity of the glider at the photogate? The distance the glider traveled along the air track is 1.25 meters.

Explanation / Answer

1.

Using conservation of energy :

Potential Energy = Kinetic Energy

mgh = (1/2)mv2

h = [(1/2)v2/g]

= 1/2(38)2/9.81

=73.6 m

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