A body is moving with an acceleration of 60 m/s^2(square).If the force applied to the body is 4200N. Calculate its mass.

Hello, for this use the 2nd law of Newton:

F = ma

Replacing:

4200 N = m * 60 m/s^2

Resolving:

4200 N / 60 m/s^2 = m

70 kg = m

The mass is 70 kg

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

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.