Science-1-Chapter-1-Gravitation : Q.1. Study the entries in the following table and rewrite them putting the connected items in a single row.
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Q.2. Answer the following questions.
a) What is the difference between mass and weight of an object. Will the mass and weight of an object on the earth be same as their values on Mars? Why?
View Solutionb) What are (i) free fall, (ii) acceleration due to gravity (iii) escape velocity (iv) centripetal force ?
View Solutionc) Write the three laws given by Kepler. How did they help Newton to arrive at the inverse square law of gravity?
View Solutiond) A stone thrown vertically upwards with initial velocity u reaches a height ‘h’ before coming down. Show that the time taken to go up is same as the time taken to come down.
View Solutione) If the value of g suddenly becomes twice its value, it will become two times more difficult to pull a heavy object along the floor. Why?
View Solution3) Explain why the value of g is zero at the centre of the earth.
5) Solve the following examples.
