Physics Practice Test – Equilibrium of Forces (Questions with Answers and Explanations)

A nail is pulled from a wall with a string tied to the nail. If the string is inclined at an angle of 30^o to the wall and the tension in the string is 50 N, the effective force used in pulling the nail is ______

A. 25 N
B. 25 N
C. 50 N
D. 50 N

The body X shown in the diagram has a mass of 6 kg and is held in equilibrium by a string and a horizontal force F. The tension T in the string is ____ [Take g as 10 ms^-2]

Two forces, each of magnitude 16 N, are inclined each other at an angle of 60°. Calculate the magnitude of their resultant. (WASSCE FM 2006)

A. 16
B. 16
C. 18
D. 18