Question

in long range target practices, why is the muzzle of a rifle not aimed directly at the center of the target? notes: neglect air resistance and any external wind forces. multiple choice the force due to gravity causes the bullet to accelerate downward toward the earth but does not influence its horizontal motion. the firing force from the gun still acts on the bullet during its flight which will affect its motion. the force due to gravity causes the bullet to accelerate in random directions since it influences its horizontal and vertical motion. the force due to gravity causes the bullet to accelerate upward but does not influence its horizontal motion.

Explanation:

• Analyze each option:
• Option 1: Gravity acts downward, causing vertical acceleration (free - fall), while horizontal motion (if no air resistance) is uniform. So the bullet will drop, hence we aim above the target. This matches projectile motion physics.
• Option 2: Once the bullet is fired, the gun's force no longer acts (neglecting other factors as per notes).
• Option 3: Gravity acts vertically downward, not randomly, and doesn't affect horizontal motion (in ideal case).
• Option 4: Gravity accelerates downward, not upward.

Answer:

The force due to gravity causes the bullet to accelerate downward toward the Earth but does not influence its horizontal motion.