find the force required to produce iacceleration of 2 metre per second square on a body of mass 10 kg what will be its acceleration if a force is double

The wording of the problem leaves much to be desired. It does not indicate in which direction is the object’s acceleration. It also fails to mention the presence or absence of friction. In order to cover all conditions, the answer must be a range of values, with the direction changing from zero to ninety degrees.

The range would be: 20 N to 120 N (100 + 20 = 120) starting from zero all the way up to ninety degrees.

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask