2. At the highest point of a projectile, the vertical velocity is _______ and the
acceleration is ___________.


2. At the highest point of a projectile, the vertical velocity is _______ and the
acceleration is ___________.


A. zero, zero


C. 9.8 m/s2 upward, 9.8 m/s2 downward


B. zero,  9.8 m/s2 downward


D. 9.8 m/s2 upward, zero2. At the highest point of a projectile, the vertical velocity is _______ and the
acceleration is ___________.


2. At the highest point of a projectile, the vertical velocity is _______ and the
acceleration is ___________.


A. zero, zero


C. 9.8 m/s2 upward, 9.8 m/s2 downward


B. zero,  9.8 m/s2 downward


D. 9.8 m/s2 upward, zero

At the highest point of a projectile's motion, the vertical velocity is **zero**, and the acceleration is **9.8 m/s² downward** (due to gravity).

Therefore, the correct answer is:

**B. zero, 9.8 m/s² downward.**

### Explanation:
- **Vertical velocity**: At the highest point, the projectile momentarily stops moving upwards and starts descending, so the vertical velocity is zero at that instant.
- **Acceleration**: Regardless of the projectile's position, the acceleration due to gravity is always directed downward and has a magnitude of approximately 9.8 m/s² on Earth.

Would you like more details or have any further questions?

Here are 5 related questions to deepen your understanding:
1. Why is the horizontal velocity constant in projectile motion?
2. How does the angle of projection affect the range of a projectile?
3. What happens to the vertical acceleration if the projectile is launched upwards?
4. How do you calculate the maximum height of a projectile?
5. How does air resistance impact projectile motion in real-world scenarios?

**Tip**: Always break the motion of a projectile into horizontal and vertical components to analyze them separately for clarity.

At the highest point of a projectile, the vertical velocity is _______ and the acceleration is ___________.

A. zero, zero

B. zero, 9.8 m/s² downward

C. 9.8 m/s² upward, 9.8 m/s² downward

D. 9.8 m/s² upward, zero

Explore the principles of projectile motion with this detailed problem. Learn why the vertical velocity is zero at the highest point and the acceleration is 9.8 m/s² downward due to gravity. This kinematics problem is suitable for students in Grades 9-12.

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