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D1 r = 5 cm = 0,05 m
m = 2 kg
a = 10 m/s
D2 P..?
D3.
P = F/A
P = m.a / A = 2.10 / 0,05^2
= 20 / 0,0025
= 8000 pa
= (2.10) / (0,05 x 0,05)
= 20 / 0,05²
= 8000 Pa
:)