Mass of an object is 10 kg. What is its weight on the earth?
Solution:Mass, m = 10 kgAcceleration due to gravity, g = 9.8 m s–2W = m × gW = 10 kg × 9.8 m s-2 = 98 NThus, the weight of the object is 98 N.
GRAVITATION
WEIGHT OF AN OBJECT ON THE MOON
The weight of an object on the earth is the force with which the earth attracts the object. In the same way, the weight of an object on the moon is the force with which the moon attracts that object. The mass of the moon is less than that of the earth. Due to this, …
Weight
We know that the earth attracts every object with a certain force and this force depends on the mass (m) of the object and the acceleration due to the gravity (g). The weight of an object is the force with which it is attracted towards the earth.We know thatF = m × a,that is,F = …
Mass
We have learnt in the previous chapter that the mass of an object is the measure of its inertia. We have also learnt that greater the mass, the greater is the inertia. It remains the same whether the object is on the earth, the moon or even in outer space. Thus, the mass of an …
MOTION OF OBJECTS UNDER THE INFLUENCE OF GRAVITATIONAL FORCE OF THE EARTH
Let us do an activity to understand whether all objects hollow or solid, big or small, will fall from a height at the same rate. We know that an object experiences acceleration during free fall. , this acceleration experienced by an object isindependent of its mass. This means that all objects hollow or solid, big …
MOTION OF OBJECTS UNDER THE INFLUENCE OF GRAVITATIONAL FORCE OF THE EARTH Read More »
TO CALCULATE THE VALUE OF g for the Earth
To calculate the value of g, we should putthe values of G, M and R ,namely, universal gravitational constant, G = 6.7 × 10–11 N m2 kg-2, mass of the earth, M = 6 × 1024 kg, and radius of the earth, R = 6.4 × 106 m.g =GM/R2g = (6.7 × 10–11 ) X …
Free Fall
Free Fall The falling of a body from a height towards the earth under gravitational force is called Free fall. Such a body is called freely falling body. When a body is under the influence of Gravitational force of earth only , then we say that body in under free fall. Practically it is possible …
IMPORTANCE OF THE UNIVERSAL LAW OF GRAVITATION
UNIVERSAL LAW OF GRAVITATION Every object in the universe attracts every other object with a force . Attraction force is directly proportional to the product of their masses. F ∝ m1 × m2 Equation 1 The force between two objects is inversely proportional to the square of the distance between them, that is, F ∝ …
Kepler’s laws
There has always been a great interest in the motion of planets. By the 16th century, a lot of data on the motion of planets had been collected by many astronomers. Based on these data, Johannes Kepler derived three laws that govern the planets’ motion. These are called Kepler’s laws. Fig – Kepler’s second law …
The inverse-square rule
According to Newton’s law, the gravitational attraction force between two point masses is inversely proportional to the square of their separation distance and directly proportional to the product of their masses. It is important to note that Kepler could not give a theory to explain the motion of planets. It was Newton who showed that …