Question 1 State the universal law of gravitation? Question 2 Define gravitation constant? Question 3 What is the value of G on earth and on the moon? Question 4 Which force is responsible for the moon revolving round the earth? Question 5 Describe how the gravitational force between two objects depends on the distance between them? Question 6 What happen to the … [Read more...] about Gravitation
Gravitation
Relative Density
Relative Density The density of a substance is defined as mass per unit volume. The relative density of a substance expresses the heaviness or density of the substance in comparison to water. For Example : Relative density of iron is 7.8 means iron is 7.8 times heavy as an equal volume of water. Relative density has no units. Density of a substance is … [Read more...] about Relative Density
Pressure in liquid
Question 1 what is meant by the term buoyancy? Question 2 Why does a block of wood held under water rise to the surface when released? Question 3 Define buoyant force? Question 4 Name the factors on which buoyant force depends? Question 5 In which direction does the buoyant force on an object due to a liquid act? Question 6 Name the factors which makes heavy … [Read more...] about Pressure in liquid
Mass, Weight, Pressure, Thrust
Question 1 Define the term mass? Give its unit? Question 2 A man weight 600 N on the earth. What is his mass.If he were taken on the moon, his weight would be 100 N.what is his mass on the moon? What is the acceleration due to gravity on the moon? Question 3 How much a 70 kg man weigh on the moon. What would be his mass on the earth and on the moon? Question 4 Define … [Read more...] about Mass, Weight, Pressure, Thrust
Free fall
Question 1 What do you mean by the term free fall? Question 2 During a free fall will heavier objects accelerate more than lighter ones? Question 3 What do you understand by the term acceleration due to gravity of earth? Question 4 What is the value of acceleration due to gravity? Question 5 Is the acceleration due to gravity of earth g a constant? Question 6 On … [Read more...] about Free fall