Three collinear horizontal forces of magnitudes 250 N, 150 N and 350 N are acting on a rigid body. If the 150 N force acts in the opposite direction, determine the resultant force. 

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  1. 550 N
  2. 350 N
  3. 250 N
  4. 450 N

Answer (Detailed Solution Below)

Option 4 : 450 N
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Detailed Solution

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Concept:

To find the resultant of collinear forces, algebraic sum is used. Forces in the same direction are added, and those in the opposite direction are subtracted.

Given:

Three forces: 250 N → right, 150 N → left (opposite direction), 350 N → right

Calculation:

Net Resultant Force = 250 + 350 - 150 = 450 N

Hence, the resultant force is: 450 N

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