Which of the following models would best represent the inner and outer core of Earth, based on the physical characteristics of each layer? A ball of clay (solid) filled with water (liquid

Gelatin (red semi-solid) on top of a cracker (brittle solid)

Rubber ball (flexible solid) painted red (thin solid covering)

A metal ball (solid) suspended in oil (liquid)

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

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