Lagrange's equations look funny at first, but they should make sense in ordinary cases. to see that this is so: (a) write down the lagrangian for a particle moving near the surface of the earth, in three dimensions, subject only to the force of gravity. (b) derive lagrange's equations of motion for this case, and show that they are the usual equations of motion you would expect.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

What equation is used to calculate the weight of an object on a plant ?