Answer:
Fₐ ≈ 38.97 N
Explanation:
The illustration forms a right angle triangle with the horizontal side been the side of horizontal force.
The horizontal component of the applied force can be calculated as follows
Force applied on the block = 45 N
The force on the horizontal is the force of acceleration use to pull the block .
Fₐ = 45 N cos 30°
The formula is gotten by using the cosine ratio of the right angle triangle formed.
Recall
cos 30° = adjacent/hypotenuse
Fₐ = 45 N cos 30°
Fₐ = 45 × cos 30°
Fₐ = 45 × 0.86602540378
Fₐ = 38.9711431703
Fₐ ≈ 38.97 N