The mass m1 is 4 kg. There is friction on the surface. When released, mass m2 will acceleration downward. 1.What tension force makes the acceleration of mass m1 equal to 3 m/s/s?
2.What mass m2 makes the acceleration of mass m2 equal to 3 m/s/s?

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it has to be b, about 97 percent.

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg