Chapter : 2. Force & Laws Of Motion
Examples of Density
Example : 19
A body weighs 30 N in air and 26 N when fully immersed in water. Calculate its relative density.
Solution. Given : Weight of body in air, W1 = 30 N
Weight of body in water, W2 = 26 N
Relative density formula is
Example : 20
Relative density of copper is 8.8. What is its density in SI system ?
Solution. Relative Density,
∴ Density of Copper = R.D. × Density of Water = 8.8 × 103 kg/m3
Example : 21
A solid weighs 60 gmf in air and 52 gmf when completely immersed in water. Calculate the following :
(i) upthrust,
(ii) volume of the solid,
(iii) relative density of the solid
Solution. Given:
Weight of solid in air = 60 gmf
Weight of solid in water = 52 gmf
∴ Loss of weight in water = 60 – 52 = 8 gmf
(i) Upthrust = loss of weight in water = 8 gmf
(ii) Since density of water is 1 gm/cm3, and weight of equal volume of water = 8 gmf
∴ Volume of solid = 8 cm3
(iii) Relative density of solid =
A body weighs 30 N in air and 26 N when fully immersed in water. Calculate its relative density.
Solution. Given : Weight of body in air, W1 = 30 N
Weight of body in water, W2 = 26 N
Relative density formula is
Example : 20
Relative density of copper is 8.8. What is its density in SI system ?
Solution. Relative Density,
∴ Density of Copper = R.D. × Density of Water = 8.8 × 103 kg/m3
Example : 21
A solid weighs 60 gmf in air and 52 gmf when completely immersed in water. Calculate the following :
(i) upthrust,
(ii) volume of the solid,
(iii) relative density of the solid
Solution. Given:
Weight of solid in air = 60 gmf
Weight of solid in water = 52 gmf
∴ Loss of weight in water = 60 – 52 = 8 gmf
(i) Upthrust = loss of weight in water = 8 gmf
(ii) Since density of water is 1 gm/cm3, and weight of equal volume of water = 8 gmf
∴ Volume of solid = 8 cm3
(iii) Relative density of solid =
Trending Articles & Blogs
- Physics Tutor, Math Tutor Improve Your Child’s Knowledge
- How to Get Maximum Marks in Examination Preparation Strategy by Dr. Mukesh Shrimali
- 5 Important Tips To Personal Development Apply In Your Daily Life
- Breaking the Barriers Between High School and Higher Education
- 14 Vocational courses after class 12th
- Tips to Get Maximum Marks in Physics Examination
- Get Full Marks in Biology Class 12 CBSE
Download Old Sample Papers For Class X & XII
Download Practical Solutions of Chemistry and Physics for Class 12 with Solutions
Recent Questions Asked
- Newton’s laws of motion asked by Dr. Mukesh Shrimali
- Process of nutrition in Amoeba asked by Rajiv Sharma
- Importance of studying physics subject in school after 10th asked by Rajiv
- Refraction Through Prism in Different Medium asked by Kirti Sharma
- Ratio and Proportion Question asked by Education Desk
- Explain all the 12 tenses with example asked by Qwerty
- Refraction Through Prism in Different Medium asked by Seema Shrimali