A student is investigating the pressure that a block of wood is exerting on the floor.The weight of the wood is 20 N. The block is 10 cm long, 5 cm wide, and 2 cm high.
a What is the biggest pressure that the block can exert on the floor?
b What is the smallest pressure that the block can exert on the floor?

Jawaban:
a. 200 Pa ( Pascal )
b. 40 Pa ( Pascal )

Penjelasan: Well, because the question asked for maximum and minimum pressure,
then we have to find the area of ​​the largest and smallest contact area, on a wooden block there are three variations of the area of ​​​​the touch area as follows:

Area Of Touch 1 :
→ A¹ = L x W = 10 x 5 = 50cm = 0,5 m

Area Of Touch 2 :
→ A² = L x h = 10 x 2 = 20cm = 0,2m

Area of touch 3 :
→ A³ = W X h = 5 x 2 = 10cm = 0,1 m

Of the three variations of the touch area above, the largest and smallest touch areas are A¹ and A²


Then the maximum pressure is:
→ Pmax = F/A³ = (w x g)/A³
Pmax = 20/0,1 = 200

Then the minimum pressure is:
→ Pmin = F/A¹ = (w x g)/A¹
Pmin = 20/0,5 = 40




I hope this helps (•‿•)