When a body is immersed in a liquid, which force(s) act on the body?

True weight of the body

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Buoyant force

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Both A and B

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Atmospheric pressure

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Solution

The correct option is C Both A and B
When a body is immersed in a liquid, two forces act on it. $W_{2}$ is the weight of the body which acts vertically downward (true weight of the body) whereas $W_{1}$ is the upward force applied by the liquid on the body. Due to up thrust, the body appears to be lighter and its weight appears to be its true weight minus the buoyant force.

Apparent weight of the body = True weight – Buoyant force = $W_{1} - W_{2}$ .

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Similar questions

When a body is immersed in a liquid, the buoyant force acts on the body:

A body is held immersed in a liquid.

(i) Name the two forces acting on the body and draw a diagram to show these forces.

(ii) State how do the magnitudes of two forces mentioned in part (i) determine whether the body will float or sink in the liquid when it is released.

(iii) What is the net force on the body if it (a) sinks, (b) floats?

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