A block of metal weighs 40 N in air and 30 N in water. What is the buoyant force on the block due to the water? The density of water is $1000 \mathrm {~kg} / \mathrm { m } ^ { 3 }$
A) 30 N
B) 40 N
C) 10 N
D) 70 N

Question

A block of metal weighs  40 N in air and  30 N in water. What is the buoyant force on the block due to the water? The density of water is $1000 \mathrm {~kg} / \mathrm { m } ^ { 3 }$
A)  30 N
B)  40 N
C)  10 N
D)  70 N

Quizplus · Accepted Answer

The buoyant force is equal to the weight of the fluid displaced by the object. The difference in weight between the object in air and in water (40 N - 30 N) is 10 N, which is the buoyant force acting on the block.

A Block of Metal Weighs 40 N in Air 1000 kg/m31000 \mathrm {~kg} / \mathrm { m } ^ { 3 }1000 kg/m3

A Block of Metal Weighs 40 N in Air $1000 \mathrm {~kg} / \mathrm { m } ^ { 3 }$