What is the reason behind the attraction between earth and moon? Every particle of this universe is attracted towards each other. The force of attraction between any two bodies or particles in this universe is called Gravitation. If earth is one of the two bodies, then the force of attraction is called gravity. So the … Read more
Can we say that acceleration due to gravity is uniform acceleration? If so, then why? Acceleration due to gravity is uniform acceleration. The rate of increase of velocity of a freely falling body on earth due to the force of gravity is called acceleration due to gravity. From this definition, it is clear that when … Read more
What kind of quantity is velocity? Explain. The rate of change of position in time with its direction is called velocity. Velocity is a vector quantity. Reason: Velocity has both magnitude and direction which means it needs both magnitude and direction to be fully expressed.
The uses of solar cell This cell is used to supply electrically in artificial satellites move along their orbits for a long time. Solar energy is being used to operate different electronic devices like pocket calculators, pocket radios, and electronic watches. Currently, electrical energy is produced from solar energy in rural areas, houses, or offices … Read more
No motion or no motion is absolute. Explain it. Actually, whether an object is at rest or not depends on the interface object. If the reference frame is actually at rest, the object will be actually at rest with respect to that time. This type of rest is called absolute rest. A body is said … Read more
Gravity is one kind of gravitation. Explain it. Every particle of this universe is attracted towards each other. If one of them is earth then this attraction is called gravity, that is the attraction of the earth on any other body is called gravity. So, we can say that in this universe the attraction between … Read more
There is no acceleration if there is no change in velocity- Explain it. The rate of change of velocity with time is called acceleration. This means if the velocity of a body changes with time then from this change we can determine acceleration. But when the body is at rest or moving at a uniform … Read more
Force of gravitation is an attraction force – Explain it. Force of gravitation is the attraction force between two bodies. Two charged bodies attract each other when the charges are opposite, which means one is positive and the other is negative. But force of gravitation works in the direction of additional straight line of two … Read more