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 …
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. These are: Fig – Kepler’s …
Isaac Newton (1642 – 1727) Isaac Newton was born in Woolsthorpe near Grantham, England.He is generally regarded as the most original and influential theorist in the history of science.He was born in a poor farming family. But he was not good at farming. He was sent to study at Cambridge University in 1661. In 1665 …
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 ∝ …
All conservation laws such as conservation of momentum, energy, angular momentum, charge etc. are considered to be fundamental laws in physics. These are based on observations and experiments. It is important to remember that a conservation law cannot be proved. It can be verified, or disproved, by experiments. An experiment whose result isin conformity with …
Solution: Let the first player be moving from left to right. By convention left to right is taken as the positive direction and thusright to left is the negative direction . If symbols m and u represent the mass and initial velocity of the twoplayers, respectively. Subscripts 1 and 2 in these physical quantities refer …
Solution:Let v be the velocity of the girl on the cart as the cart starts moving.The total momenta of the girl and cart before the interaction= 40 kg × 5 m s–1 + 3 kg × 0 m s–1= 200 kg m s–1.Total momenta after the interaction= (40 + 3) kg × v m s–1= …
Solution:We have the mass of bullet,m1 = 20 g (= 0.02 kg) and the mass ofthe pistol, m2 = 2 kg; initial velocities of the bullet (u1 ) and pistol (u2 ) = 0,respectively. The final velocity of the bullet, v1 = + 150 m s-1. The directionof bullet is taken from left to right …
Law of conservation of momentum “For two or more bodies in an isolated system acting upon each other, their total momentum remains constant unless an external force is applied. Therefore, momentum can neither be created nor destroyed.“ Suppose two objects (two balls A and B, say) of masses mA and mB are travelling in the …
Third Law of Motion “To every action, there is an equal and opposite reaction.“ Applications of third law of motion It means that if body A exerts a force F1 on body B, and the body 2 exerts a force F2 on body 1, then: Newton’s Third Law F1=F2 That is, they are equal in …
