1. What do you expect about the horizontal velocity of a projectile? (neglecting air resistance) a. The horizontal velocity is zero. b. The horizontal velocity is constant. c. The horizontal velocity varies with time. d. The horizontal velocity varies with mass. 2. What is the horizontal acceleration of a projectile? a. 0 m/s² b. 9.8 m/s² c. -9.8 m/s² d. 0 m/s
Answer (1)
Answer:Here are the answers:# Step 1: Analyzing the first questionThe first question asks about the horizontal velocity of a projectile, neglecting air resistance.# Step 2: Understanding projectile motionIn projectile motion, the horizontal velocity remains constant if air resistance is neglected, as there is no force acting in the horizontal direction.# Step 3: Eliminating incorrect optionsOptions a, c, and d can be eliminated because the horizontal velocity is not zero, does not vary with time, and does not depend on the mass of the projectile.# Step 4: Selecting the correct answer for the first questionThe correct answer is b. The horizontal velocity is constant.# Step 5: Analyzing the second questionThe second question asks about the horizontal acceleration of a projectile.# Step 6: Applying the concept of projectile motionSince there is no force acting in the horizontal direction (neglecting air resistance), the horizontal acceleration is zero.# Step 7: Selecting the correct answer for the second questionThe correct answer is a. 0 m/s².The final answer is: $\boxed{b, a}$
