A satellite of mass m is in circular orbit of radius 2re about the earth. What is the minimum amount of additional energy required to transfer the satellite to an orbit of radium 4re?.

Well the magnitude of its acceleration related to that car starts with the oil change like when you have to change the oil in your car you have to make sure that your precious car is starting really propley and very well

Initial velocity,  u = 4.9 m/sfinal velocity = v m/sinitial height,  h₁ =  245 m    final height, h₂ = 0a = -9.8  m/s²time taken = t secondss = ut + 0.5at²⇒  (h₂-h₁) = ut + 0.5at²⇒  0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get   t = 7.59sv  = u +  at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is  69.48 m/s downward

Two cars collide, lock bumpers and move together after the collision.this collision is known as perfectly inelastic collision.

Idon't understand is there supposed to be a list or something if there is pm or add in under this message i will do my best to .