Q5. Two forces 4 N and 3 N act at an
angle of 90°. The magnitude of their
resultant is *
O (a) 4 N
O (b) 3 N
O (c) 5 N
O (d) 7 N
Answers
Answer:
Given:
Diameter of a metallic ball is 4.2cm
Density of the metal is 8.9g per cm
Have to find :-
What is the mass of the metallic ball ?
\Large{\underline{\underline{\bf{Calculations:-}}}}Calculations:−
As according to the Question :-
Ball is in sphere shape .
So , Volume of sphere is 4/3πr³
So , substituting the values from given
Volume of sphere ↠ 4/3 x 22/7 x ( 2.1 )³
↠ 38.8 cm³
Therefore ,
As we know the formulas of the Density :-
From this we get ,
Mass ↠ Density x Volume
↠ 8.9 x 38.8
↠ 345.3g { The required Answer }
Explanation:
Given:
Diameter of a metallic ball is 4.2cm
Density of the metal is 8.9g per cm
Have to find :-
What is the mass of the metallic ball ?
\Large{\underline{\underline{\bf{Calculations:-}}}}Calculations:−
As according to the Question :-
Ball is in sphere shape .
So , Volume of sphere is 4/3πr³
So , substituting the values from given
Volume of sphere ↠ 4/3 x 22/7 x ( 2.1 )³
↠ 38.8 cm³
Therefore ,
As we know the formulas of the Density :-
From this we get ,
Mass ↠ Density x Volume
↠ 8.9 x 38.8
↠ 345.3g { The required Answer }