A5 kg brick is dropped from a height of 12m on a spring with a spring constant 8 kn/m. if the spring has unstretched length of 0.5m, find: a) the shortest length the spring will be compressed before recoil, and
b) the final length of the spring once the whole system become static.

0.1164 m

0.49387 m

Explanation:

m = Mass = 5 kg

g = Acceleration due to gravity = 9.81 m/s²

h = Height from which brick falls = 12 m

k = Spring constant = 8 kN/m

a) Potential energy of the brick

Potential energy in spring

The compression of spring = 0.5-0.3836 = 0.1164 m

b) Weight of the brick

The final length of the spring = 0.5-0.00613 = 0.49387 m

answer: point c: b. 1/2 potential, 1/2 kinetic, point a: 3/4 of its potential energy, point d or b: 3/4 potential, 1/4 kinetic

explanation: i cant explain. it's difficult to explain.

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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