Question

The weight of a body in air is 100 N.How much will it weight in water if it displaces 400 cc of water?(g = 9.8 m/s2​

Answer 1

Answer:

Explanation:

Given that,

Weight of body in air =  

100

 

N

Buoyant force = Weight of liquid displaced

Volume of water displaced =  

400

 

c

c

2

Density of water =  

1

g

/

c

m

3

In this case,

 

ρ

=

m

V

 

m

=

ρ

×

V

 

m

=

1

×

400

 

m

=

400

g

We know that,

The weight of water displaced is

 

W

=

m

×

g

 

W

=

2

5

×

9.8

 

W

=

3.92

N

Now, weight of the object in water

 

W

=

100

−

3.92

 

W

=

96.08

 

W

=

96

N

Hence, the weight of object in water is  

96

 

N