A person presses a shovel with a force of 600 N. What pressure does a shovel exert on the soil if its blade is 20

A person presses a shovel with a force of 600 N. What pressure does a shovel exert on the soil if its blade is 20 cm wide and its cutting edge is 0.5 mm thick? Why are shovels sharpened sharply?

In this problem, we will use the formula as in the previous one.

Given:
P = 600 N; a = 20 cm = 0.2 m; B – 0.5 mm = 0.0005 m
Find: p
Solution:
R
= F / S = F / (a * b) = 600
/ (0.2 • 0.0005)
= 6,000,000 Pa = 6,000 kPa
By sharpening the cutting edge of the shovel, we thus reduce its area, therefore, increase the pressure on the soil (since P
= F / S). Because of this, we need less effort to drive the shovel blade into the ground.

Answer: 6000 kPa (6 • 103 kPa)