Question:

Two forces whose magnitudes are in the ratio 3:5 give a resultant of 35N. If the angle between them is $60^\circ$, the magnitude of each force is.

Updated On: Jul 7, 2022
  • 3N, 5N
  • 9N, 25N
  • 15N, 25N
  • 21N ,35N
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The Correct Option is C

Solution and Explanation

$R = 2F \, \cos \, 60 = F , \alpha = \frac{\theta}{2}$ makes equal angle with both vectors .
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Notes on Newtons Laws of Motion

Concepts Used:

Newtons Laws of Motion

Newton’s First Law of Motion:

Newton’s 1st law states that a body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it.

Newton’s Second Law of Motion:

Newton’s 2nd law states that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the object’s mass.

Mathematically, we express the second law of motion as follows:

Newton’s Third Law of Motion:

Newton’s 3rd law states that there is an equal and opposite reaction for every action.