Quinn and Quade had to make a model of the Earth's four main layers using items from around their house. They did not
have to include the lithosphere in their project. The layers had
to accurately represent the density of each layer in relation to
each other. They gathered several items from around the
house. The materials are listed below.
Items gathered:
small bouncy ball, marble ball, tennis ball, small iron ball, large
iron ball, slime, thin styrofoam sheet, styrofoam ball,
cardboard, clay, play-dough, icing.
Choose from the list of materials to create a model of the Earth
that represents the density of each layer. Identify what each
item would represent in your model and explain why you chose
them.
Omg

This question involves the concepts of the frictional force, Newton's second law of motion, and the equations of motion.

a) The force of kinetic friction acting on the block is "-30.28 N".

b) The acceleration of the block is "-2.48 m/s²".

c) The block will slide "8.9 m" before coming to rest.

a)

The kinetic friction force is given by the following formula:

where,

F = frictional force = ?

= coefficient of kinetic friction = 0.253

m = mass of block = 12.2 kg

g = acceleration dueto gravity = 9.81 m/s²

Therefore,

F = - 30.28 N (negative sign due to resistive force)

b)

According to Newton's Second Law of Motion:

F = ma

a = -2.48 m/s² (negative sign due to deceleration)

c)

Using the third equation of motion to calculate the distance:

where,

s = distance = ?

vf = final speed = 0 m/s

vi = initial speed = 6.65 m/s

Therefore,

s = 8.9 m

Learn more about Newton's Second Law of Motion here:

link

The attached picture shows Newton's Second Law of Motion.