Con base en el tema ley de ohm, resistividad y resistencia resuelva los siguientes ejercicios (Valor 0.4 c/u). Tenga en cuenta la conversión de unidades a la unidad
patrón, antes de realizar las operaciones. Es decir la tabla de múltiplos y
submúltiplos respectiva.

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

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards