High School

A force of 350 lb is resolved into forces at right angles to one another. The angle of \( f_2 \) is 67° from the 350 lb force. Find \( f_2 \).

a) 180 lb
b) 235 lb
c) 290 lb
d) 320 lb

Answer :

Final answer:

The force of 250 N at 30 degrees to the x-axis can be resolved into components using the cosine and sine of the angle: 125√3 N along the x-axis and 125 N along the y-axis.Hence option B is correct.

Explanation:

To resolve a force of 250 N that acts at an angle of 30° to the positive x-axis into its components, we use trigonometry. The component along the x-axis is found by multiplying the force by the cosine of the angle (cos(30°)), and the component along the y-axis is found by multiplying the force by the sine of the angle (sin(30°)).

The x-component of the force, Fx, is calculated as follows:

  • Fx = 250 N × cos(30°)
  • Fx = 250 N × √3/2
  • Fx = 125√3 N

The y-component of the force, Fy, is:

  • Fy = 250 N × sin(30°)
  • Fy = 250 N × 1/2
  • Fy = 125 N

Therefore, the force can be resolved into a 125√3 N component along the x-axis and a 125 N component along the y-axis.