A ball is thrown upwards and returns to the ground describing praraboleic path. Which of the quantities remain constant throufgout the motion.

Explanation

To determine which quantities remain constant throughout the motion of a ball thrown upwards and returning to the ground along a parabolic path, we can analyze the motion in terms of its horizontal and vertical components.

### Step-by-Step Solution:

1. **Understanding the Motion**:
- When a ball is thrown upwards at an angle, it follows a parabolic trajectory. This motion can be analyzed by breaking it down into horizontal (x) and vertical (y) components.

2. **Identifying Components of Velocity**:
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