An industrial worker needs to move a 75-kg crate across a concrete floor. The coefficient of kinetic friction between the crate and the concrete floor is μₖ = 0.31. The worker applies a pulling force of 255N at an angle of 6.0° from the horizontal to slide the crate. Considering the setup, explain why the crate experiences a different acceleration when the force is applied at an angle compared to when the force is applied horizontally.

• A. Applying the force at an angle effectively reduces the crate's weight, leading to less resistance and higher acceleration.
• B. Applying the force at an angle increases the friction by pressing the crate more firmly against the surface, purportedly resulting in reduced acceleration.
• C. Applying the force at an angle increases the horizontal component of force, leading to greater acceleration, irrespective of frictional force.
• D. Applying the force at an angle slightly reduces the normal force, which decreases the frictional force opposing motion.

Answer: (D)