Kann mir bitte jemand bei diesen 2 Aufgaben helfen? Die Antworten lauten 5) v = 25,01199712 m·s-1≈ 25 m·s-1 und v = 90,04318964 km·h-1≈ 90 km·h-1 und für 6) = 0,0004982699 kg ≈ 0,5 g dass heißt ich brauche nur noch den Rechenweg.

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

god i hope this !

3. dark matter

empty space could also be a simple vacuum