A student wants to determine the value of the acceleration of freefall g.
A steel ball is dropped from an electromagnet. The ball falls vertically. The ball hits a trapdoor and opens the trapdoor.
The ball travels a distance s from the bottom of the electromagnet to the trapdoor in a time t.
The student uses the equation s = to determine g.
[2]
[4]
The ball collides elastically with the trapdoor with a speed of 4.4 m s–1.
The graph of force acting on the ball against time is shown below.
The mass of the ball is 0.050 kg.
p1 = ............................................ kg m s–1 [1]
p2 = ............................................ kg m s–1 [3]
Calculate the final speed v of the trapdoor immediately after the collision.
v = ................................................ m s–1 [2]
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