Question

2. A body is held immersed in a liquid. (i) Name the two
forces acting on body
(ii) State how do the magnitudes of two forces
mentioned in part
(iii) determine whether the body will
float or sink in liquid when it is released.
(iv) What is
the net force on body if it (a) sinks, (b) floats ?​

Answer 1

Explanation:

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Answer 2

(i) Two forces acting on the body are as listed below:

• Weight of the body (downwards)
• Upthrust of the liquid (upwards)

(ii) If the weight of the body is greater than the upthrust acting on it, the body will sink

If the weight of the body is equal to or less than the upthrust acting on it, the body will float.

(iii) (a) The net force acting on the body when it sinks is body’s own weight.

(b) The net force acting on the body when it floats is the upthrust due to the liquid.