Let the period of revolution of a planet at a distance R from a star be T. Prove that if it was at a distance of 2R from the star, its period of revolution will be 8T. February 4, 2024 by Acche Marks
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? February 4, 2024 by Acche Marks
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. February 4, 2024 by Acche Marks
Write the three laws given by Kepler. How did they help Newton to arrive at the inverse square law of gravity? February 4, 2024 by Acche Marks
What are (i) free fall, (ii) acceleration due to gravity (iii) escape velocity (iv) centripetal force ? February 4, 2024 by Acche Marks
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? February 4, 2024 by Acche Marks