Question 2. Answer the following. 1.Name the forces acting on the body immersed in the liquid. 2.What is density? State its unit. 3.State properties of molecule. 4.Explain the condition when object sinks in liquid and when it floats in liquid. 5.State types of potential energy with examples. Plz answer correctly
Answers
Answer:
1. (i) When an object is immersed in a liquid, two forces act on it
(a) Weight of the object which acts in downward direction, i.e. it tends to pull down the object.
(b) Buoyant force (upthrust) which acts in upward direction, i.e. it tends to push up the object.
(ii) Three conditions of floating and sinking are
(a) If the buoyant force exerted by the liquid is less than the weight of an object, the object will sink in the liquid.
(b) If the buoyant force is equal to the weight of the object, then the object will float in the liquid.
© If the buoyant force is more than the weight of the object, the object will rise in the liquid and then float.
1. Buoyancy or buoyant force is equal to the upward force acting on the body immersed in the liquid.
