The orbit of a planet is an ellipse with the Sun at one of the foci.įigure 1.5 shows the elliptical orbit of a planet revolving around the Sun (S). How did they help Newton to arrive at the inverse square law of gravity? (c) Write the three laws given by Kepler. In uniform circular motion of a body, the force acting on the body is directed towards the centre of the circle. When a body is thrown vertically upward from the surface of the earth, the minimum initial velocity of the body for which the body is able to overcome the downward pull by the earth and can escape the earth forever is called the escape velocity. The acceleration produced in a body due to the gravitational force of the earth is called the acceleration due to gravity.
Whenever an object moves under the influence of the force of gravity alone, it is said to be falling freely.
#NEWTON UNIT CGS FREE#
(b) what are (i) free fall, (ii) acceleration due to gravity (iii) escape velocity (iv) centripetal force? The mass of an object will be the same on the earth and Mars, but the weight will not be the same because the value of g on Mars is different from that on the earth. It is a vector quantity and its SI unit is the newton (N). The weight of an object is different at different places on the earth. It is directed towards the centre of the earth.
The weight of an object is the force with which the earth (or any other planet/ moon/star) attracts it. It is a scalar quantity and its SI unit is kg. It is same everywhere in the Universe and is never zero. The mass of an object is the amount of matter present in it. (a) What is the difference between mass and weight of an object? Will the mass and weight of an object on the earth be the same as their values on Mars? Why? Gravitation Class 10 Maharashtra Board Question 2. Study the entries in the following table and rewrite them putting the connected items in a single row : I Maharashtra State Board Class 10 Science Solutions Part 1 Chapter 1 GravitationĬlass 10 Science Chapter 1 Gravitation Exercise Question 1. Balbharti Maharashtra State Board Class 10 Science Solutions Part 1 Chapter 1 Gravitation Notes, Textbook Exercise Important Questions and Answers.
0 kommentar(er)
