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a force is acting on an object with an angle theta ...........................mass is m kg................whats the force required to just lift it from the ground??????? PLS ExplaIN!!!!!!!!!!!!!!

a force is acting on an object with an angle theta ...........................mass is m kg................whats the force required to just lift it from the ground???????


PLS ExplaIN!!!!!!!!!!!!!!

Grade:9

2 Answers

Jaya IITK
207 Points
9 years ago

To lift the body from ground u need total upward force on object equal to total downward force..

 

Draw free body diagram n u will see normal and Fsin theta acts in vertically upward direction.

 

And weight acts in vertically downward direction

 

Thus 

 

F sin theta + normal = weight

 

Fsin @ + N = mg

 

BEST OF LUCK!!!!!!!!!!!!!!!!

 

 

Plzzzzz approve my answer by clicking on yes below!!!!

khoon kill
21 Points
9 years ago

let's assume surface is frictionless.the most optimum case is when @=90deg&F=Mg,so that N=0.

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