Question

A body has a weight 50 N in air. After immersing completely in liquid it's weight is 20 N. Then the buoyant force on the body will be

Answer 1

We have,

Weight in air = 50 N
Weight in water = 20 N
Buoyant force applied = ?

We know,

Buoyant force + New weight = Actual weight

So, We have new weight = 20 N and actual weight = 50 N

Buoyant force + 20 = 50 N
Buoyant force = 50-20
Buoyant force = 30 N