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
Class 9
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
Conservation of Momentum
Question 1 State the law of conservation of mass? Question 2 Discuss the conservation of momentum in a rocket taking off from the ground? Question 3 A 60 g bullet fired from a 5 kg gun leaves with a speed of 500 m/s. Find the speed with which the gun recoils? Conservation of Momentum When two or more bodies act upon one another, their total momentum remains conserved … [Read more...] about Conservation of Momentum
Newton’s Third Law of Motion
Question 1 What is newton's third law of motion? Question 2 Give example of newton's third law of motion? Question 3 Which physical principle is involved in the working of a jet aeroplane ? Question 4 Name the principle on which a rocket works? Question 5 Why is it difficult to walk on a slippery road? Question 6 Why a runner presses the ground with his feet … [Read more...] about Newton’s Third Law of Motion
Newton’s second Law of Motion
Question 1 State Newton's second law of motion? Question 2 State the relationship between momentum and acceleration? Question 3 If the mass of a body and the force acting on it are both doubled,what happens to the acceleration? Question 4 Explain why a cricket player moves his hand backwards while catching a fast cricket ball? Question 5 Find the acceleration … [Read more...] about Newton’s second Law of Motion