Answers

2015-02-14T20:38:27+05:30
If u are standing on a steep hill and have to push your car because u dont have petrol in it to run it it would be easier to do it. 
but if u do same thing on a flat road it would be difficult.
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2015-02-14T20:38:54+05:30
In an atmosphere without friction ie in ideal condition 
If a force is exerted in a direction say  \alpha so the body will move in the direction - \alpha .So in this condition after unit time say 1 sec the body will move because there is no force opposing it nd not by that existing force .
Hence proved a body can move without force
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