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Physics
Class 9
Lakhmir Singh
1
Chapter 1: Motion
117 questions
2
Chapter 2: Force and Laws of Motion
114 questions
3
Chapter 3: Gravitation
157 questions
Q1
Question 24:
Why does a block of wood held under water rise to the surface when released?
Q2
Question 26:
Fill in the following blanks with suitable words :
(a) The amount of force acting perpendicularly per unit area is called ____________.
(b) ____________ force makes the object appear lighter in water.
(c) A heavy ship floats on water because its ____________ density is less than that of water.
(d) In fluids (liquids and gases), pressure acts in ____________ directions and ____________ as the depth increases.
(e) In order to sink in a fluid, the density of an object must be ____________ than the density of the fluid.
(f) Snowshoes work by distributing the person’s ____________ over a much bigger ____________.
(g) If the area of a snowshoe is five times ____________ than the area of an ordinary shoe, then the pressure exerted by it would be five times ____________.
(a) The amount of force acting perpendicularly per unit area is called ____________.
(b) ____________ force makes the object appear lighter in water.
(c) A heavy ship floats on water because its ____________ density is less than that of water.
(d) In fluids (liquids and gases), pressure acts in ____________ directions and ____________ as the depth increases.
(e) In order to sink in a fluid, the density of an object must be ____________ than the density of the fluid.
(f) Snowshoes work by distributing the person’s ____________ over a much bigger ____________.
(g) If the area of a snowshoe is five times ____________ than the area of an ordinary shoe, then the pressure exerted by it would be five times ____________.
Q3
Question 27:
(a) What is the difference between the density and relative density of a substance?a
(b) If the relative density of a substance is 7.1, what will be its density in SI units?
View all question(b) If the relative density of a substance is 7.1, what will be its density in SI units?
4
Chapter 4: Work and Energy
128 questions
5
Chapter 5: Sound
162 questions
Question
Question 26:
Fill in the following blanks with suitable words :
(a) The amount of force acting perpendicularly per unit area is called ____________.
(b) ____________ force makes the object appear lighter in water.
(c) A heavy ship floats on water because its ____________ density is less than that of water.
(d) In fluids (liquids and gases), pressure acts in ____________ directions and ____________ as the depth increases.
(e) In order to sink in a fluid, the density of an object must be ____________ than the density of the fluid.
(f) Snowshoes work by distributing the person’s ____________ over a much bigger ____________.
(g) If the area of a snowshoe is five times ____________ than the area of an ordinary shoe, then the pressure exerted by it would be five times ____________.
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Answer:
(a) The amount of force acting perpendicularly per unit area is called pressure.
(b) Buoyant force makes the object appear lighter in water.
(c) A heavy ship floats on water because its average density is less than that of water.
(d) In fluids (liquids and gases), pressure acts in all directions and increases as the depth increases.
(e) In order to sink in a fluid, the density of an object must be greater than the density of the fluid.
(f) Snowshoes work by distributing the person’s weight over a much bigger area.
(g) If the area of a snowshoe is five times bigger than the area of an ordinary shoe, then the pressure exerted by it would be five times smaller.
(b) Buoyant force makes the object appear lighter in water.
(c) A heavy ship floats on water because its average density is less than that of water.
(d) In fluids (liquids and gases), pressure acts in all directions and increases as the depth increases.
(e) In order to sink in a fluid, the density of an object must be greater than the density of the fluid.
(f) Snowshoes work by distributing the person’s weight over a much bigger area.
(g) If the area of a snowshoe is five times bigger than the area of an ordinary shoe, then the pressure exerted by it would be five times smaller.
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Practice more questions from Physics (Lakhmir Singh)
Q1
Question 24:
Why does a block of wood held under water rise to the surface when released?
Q2
Question 26:
Fill in the following blanks with suitable words :
(a) The amount of force acting perpendicularly per unit area is called ____________.
(b) ____________ force makes the object appear lighter in water.
(c) A heavy ship floats on water because its ____________ density is less than that of water.
(d) In fluids (liquids and gases), pressure acts in ____________ directions and ____________ as the depth increases.
(e) In order to sink in a fluid, the density of an object must be ____________ than the density of the fluid.
(f) Snowshoes work by distributing the person’s ____________ over a much bigger ____________.
(g) If the area of a snowshoe is five times ____________ than the area of an ordinary shoe, then the pressure exerted by it would be five times ____________.
(a) The amount of force acting perpendicularly per unit area is called ____________.
(b) ____________ force makes the object appear lighter in water.
(c) A heavy ship floats on water because its ____________ density is less than that of water.
(d) In fluids (liquids and gases), pressure acts in ____________ directions and ____________ as the depth increases.
(e) In order to sink in a fluid, the density of an object must be ____________ than the density of the fluid.
(f) Snowshoes work by distributing the person’s ____________ over a much bigger ____________.
(g) If the area of a snowshoe is five times ____________ than the area of an ordinary shoe, then the pressure exerted by it would be five times ____________.
Q3
Question 27:
(a) What is the difference between the density and relative density of a substance?a
(b) If the relative density of a substance is 7.1, what will be its density in SI units?
View all(b) If the relative density of a substance is 7.1, what will be its density in SI units?
Practice questions from Physics (Lakhmir Singh)
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| Question Text | Question 26:
Fill in the following blanks with suitable words : (a) The amount of force acting perpendicularly per unit area is called ____________. (b) ____________ force makes the object appear lighter in water. (c) A heavy ship floats on water because its ____________ density is less than that of water. (d) In fluids (liquids and gases), pressure acts in ____________ directions and ____________ as the depth increases. (e) In order to sink in a fluid, the density of an object must be ____________ than the density of the fluid. (f) Snowshoes work by distributing the person’s ____________ over a much bigger ____________. (g) If the area of a snowshoe is five times ____________ than the area of an ordinary shoe, then the pressure exerted by it would be five times ____________. |
| Topic | Gravitation |
| Subject | Science |
| Class | Class 9 |
| Answer Type | Text solution:1 |
| Upvotes | 45 |
