Avery light spring is 10.0 cm long with no mass attached to it. when 50.0 g are added, its length increases to 11.25 cm. another 100 g is added and it sets into oscillation. how much time is needed for 100 oscillations.

38.847 seconds

Explanation:

m = Mass

x = Compression of spring

k = Spring Constant

g = Acceleration due to gravity = 9.81 m/s²

From Hooke's law

Additional mass

m = 0.1+0.05 = 0.15 kg

Angular frequency

Time for one oscillation is given by

For 100 oscillations

The time needed for hundred oscillations is 38.847 seconds

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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i think the answer is a and b

i wish you luck