Question

1. Why is it difficult to hold a school
bag having a strap made of a thin
and strong string?
2. What do you mean by buoyancy?
3. Why does an object float or sink
when placed on the surface of
water?
​

Answer 1

Explanation:

1. It is difficult to hold a school bag having a thin strap because the pressure on the shoulders is quite large. This is because the pressure is inversely proportional to the surface area on which the force acts.
2. Buoyancy , or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid.
3. An object float or sink when placed on the surface of the water because, ... An object floats in water if its density is less than that of water. When the object's weight force is balanced by the upward push of the water on the object.

Hope it's helpful for you ✌✌

Answer 2

Answer ❣️----

1. it is difficult to hold a school bag having a thin strap because the pressure on the shoulders is quite large. This is because the pressure is inversely proportional to the surface area on which the force acts.
2. Buoyancy (/ˈbɔɪənsi, ˈbuːjənsi/), or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid.
3. An object float or sink when placed on the surface of the water because, ... An object floats in water if its density is less than that of water. When the object's weight force is balanced by the upward push of the water on the object.