A student is investigating the pressure that a block of wood is exerting on the floor. The weight of the wood is 20N. 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?
Answers
Answer:
A student is investigating the pressure that a block of wood is exerting on the floor. The weight of the wood is 20N. 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?
Answer:
here you go
Explanation:
Mass of the wooden block, m=5kg
Thrust due to wooden block,
Mg=5kg×9.8ms
−2
=49N
(a) Surface area of 20cm×10cm surface,
A=(20×10)cm
2
=(0.2×0.1)m
2
=0.02m
2
P=
A
mg
P=
0.02m
2
49N
=
0.02
49
Nm
−2
or Pressure, P=2450Nm
−2
.
(b) Surface area of 40cm×20cm surface,
A=(40×20)cm
2
=(0.4×0.2)m
2
=0.08m
2
P=
0.08m
2
49N
=
0.08
49
Nm
−2
or Pressure, P=612.5Nm
−2
.