Vector result

Classical Mechanics Level 2

Which pair of following forces cannot give a resultant force of 4N?

2N and 8N 2N and 6N 2N and 4N 2N and 2N

Dhiraj Das by Dhiraj Das , 22, India

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1 solution

Nelson Mandela
Aug 20, 2015

When we take two vectors their sum lie in the range of a+b and a-b.(as cos varies from -1 to 1).

So, the maximum of 8 and 2 is 10N and the minimum is 6N.

So, the pair cannot give a resultant of 4N.

1 Helpful 0 Interesting 0 Brilliant 0 Confused

why not option 2 which states 2N and 4N because 2+4=6 and 2-4= 2

Prakhar Dhumas - 5 years, 9 months ago

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So for option 2, The maximum is 6N and minimum is 2N and 4N lies in this range. So, 2N and 4N can give a resultant of 4N.

Nelson Mandela - 5 years, 9 months ago

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