Question

#1 - An A-380 of total mass 550,000 kg accelerates from rest under the thrust from its for engines. If the total thrust is 1.25 x106 N and the distance it accelerated is 2800 m, calculate

a) the kinetic energy of the plane at this run and

b) its speed at that moment.

#2 -    A 1.40   kg   coconut   5.50   m   above   the   ground   fall   from   the   tree.

   a)       Calculate   its   gravitational   potential   energy   before   it   felt.  
   b)   Calculate   its   kinetic   energy   just   before   it   hits   the   ground.  

Answer 1