What are the "observations above" in this question?
Answer:
The force is 3305.6 N.
Explanation:
Final velocity, v = 0
time, t = 2.25 ms
initial velocity, u = 4.25 m/s
mass, m = 1.75 kg
Let the acceleration is a.
Use first equation of motion.
v = u + a t
0 = 4.25 + a x 0.00225
a = - 1888.9 m/s^2
The force is
F = ma
F = 1.75 x 1888.9
F = 3305.6 N
If i thought about this properly the answer is b
To solve this problem it is necessary to apply the concepts related to the Pressure which describes the amount of Force made on an area unit.
Its mathematical expression can be defined as

Where,
F= Force
A = Area
Our values are given as

With the diameter we can find the Area of the circular heel, that is


To find the force by weight we need to apply the Newton's second Law



Finally the pressure would be




Therefore the pressure that she exerts on the carpet sample is 6.788Mpa