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Monday, 20 April 2026
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Physics Past Questions and Answers

Topic: Triangles and polygon of forces

Jamb Physics Questions - Triangles and polygon of forces

Question 1:
A body of mass 5kg initially at rest is acted upon by two mutually perpendicular forces 12N and 5N as shown in fig.3. If the particle moves in the direction QA, calculate the magnitude of the acceleration
  • A 0.40ms<sup style='font-size: smaller;'>-2</sup>
  • B 1.40ms<sup style='font-size: smaller;'>-2</sup>
  • C 0.26ms<sup style='font-size: smaller;'>-2</sup>
  • D 2.60ms<sup style='font-size: smaller;'>-2</sup>
  • E 3.40ms<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation
Question 2:
A constant force of magnitude F acts on an object of mass 0.04kg initially at rest at a point O. if the speed of the object when it has moved 50m from O is 500ms-1, what is the value of F?
  • A 0.4N
  • B 100.0N
  • C 250.0N
  • D 1000.0N
View Answer & Explanation
Question 3:
In fig 3, three forces F1, F2, and F3 acting at O are in equilibrium. If the magnitude of F1 is 10N,and the magnitude of F2 is 5N, find the magnitude of F3
  • A 26.4N
  • B 15.0N
  • C 13.2N
  • D 10.0N
View Answer & Explanation
Question 4:
The resultant of two forces acting on an object is maximum if the angle between them is
  • A 45°
  • B
  • C 90°
  • D 180°
View Answer & Explanation
Question 5:
If the total force acting on a particle is zero, the linear momentum will
  • A Increase
  • B Decrease
  • C Be Constant
  • D Increase then decrease
View Answer & Explanation