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Selina Solutions Class 9 Physics Solutions for Exercise 5A in Chapter 5 - Chapter 5 Upthrust In Fluids Archimedes Principle And Floatation

Question 6 Exercise 5A

Why is a force needed to keep a block of wood inside water?

Answer:

An upward force, an upthrust is required to keep a block of wood in water as the upthrust due to water on the block when it is completely submerged is much more than its weight

Video transcript
"hello everyone welcome to neetu this is priya and here we have an exciting question to answer let us look into the question why is a force needed to keep a block of food inside water because an upward force called upthrust is required to get to a block of food in water as the upthirst force due to water on the block when it is completely submerged is much more than its width so that's why a force is needed to keep a block of wood inside the water why because and upward force which is a of thrust is required a block off put in water because this up risk force due to water on the block when it is completely submerged is much more than its weight so that's why we need an out force so some some force is required to keep a block of wood inside the water hope you understand this video if you like my video please subscribe to a little channel and if you have any doubts you can keep a message in comment box thank you "
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