MASS & WEIGHT 10 GRAVITATION Class 9th Science (Physics) (Answers Key) 1 Kilogram (kg) 2 Mass 3 The moon has less gravitational force than Earth. 4 Mass 5 60 N 6 The mass of anything is a measurement of how much force it will take to change its course. Weight can be described as the downward force exerted on an object by gravity. The gravitational force increases with the mass of the object: the more inertia it has, the stronger gravity pulls. 7 In a nutshell, mass refers to the amount of matter in an item, whereas weight refers to the gravitational force acting on that matter. So, weight is essentially the product of gravity. The conversion factor, g (10N/kg on Earth), is made up of units that divide kilograms by N. 8 Because mass is not affected by gravity, it differs from weight. The weight of an object is determined by its mass (the quantity of matter it contains) and gravitational attraction. 9 The mass is determined by the volume, and the volume is determined by the mass. If we keep the gas at the same pressure and temperature and fill an object with a variable volume, such as a balloon or a cylinder with a sliding end, the final volume is precisely proportional to the amount of gas we inject. 10 The mass ascribed to a moving body in the special theory of relativity is known as relativistic mass. As the body's velocity approaches the speed of light, the relativistic mass m becomes infinite, therefore even if a body is arbitrarily provided with massive amounts of momentum and energy, its velocity will always be less than c. Page 1 Email: Phone No: Website:
[email protected] +91 93299 65211 www.brisklearning.com Address: Office No. 605, CTS No. 658, Gayatri Bhuvan, A & B, Kandivali, Dattani Park, Thakur Village, Kandivali East, Mumbai, Maharashtra 400101
Tiếng Việt