Gravitation

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…

Relative density

Relative density The density of a substance is defined as mass per unit volume.                Mass Density=————-               Volume S.I. unit of density is kg/m3  The relative density of a substance is the ratio of its density to that of water    …

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…

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…

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…