Answers

2016-04-16T23:08:25+05:30
Gravitational and Frictional

0
2016-04-17T10:35:27+05:30
Gravitational force opposite to the motion of rocket 
friction due to air 
thrust which hits the ground provides acceleration 
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gravity, friction and normal forces are acting on rocket
After leaving the launching pad the normal force becomes zero as it loses contact with the ground