Question

1.)

a. List Kepler’s Laws, and explain how each one differed from the Greek idea of the heavens.

b. List Newton’s Laws, and give an example of them.

Answer 1

Kepler's Law's: All planet's Revolve around sun in elliptical orbits with sun at one of foci . 2) Vector joining planet and sun sweeps out equal Area in equal time. 3) square of time period is proportional to cube of semi - major axis. T^2 alpha a^3 Greek idea: They consider earth at the centre circle by moon , sun , the planets and the 2) They consider orbit to be circular concentric to each other 3) earth is consider to be stationary b) Newton's Law of motion: 1) A body continues is stake of rest of motion un less compelled by an external un balanced force ex - Dust particle come out of carpet when beaten with a stick. 2) Force is proportional to rate of change of momentum F alpha dp/dt rightdoublearrow f = ma if mass is constant 3) For every action there is an equal and opposite reaction ex: Rocket Motion