A ball is thrown vertically upwards, its motion is uniform throughout. True/False.

Answer

To determine whether the statement "A ball is thrown vertically upwards, its motion is uniform throughout" is true or false, we can analyze the motion of the ball step by step.

### Step-by-Step Solution:

1. **Understanding Uniform Motion**:
- Uniform motion means that an object covers equal distances in equal intervals of time, regardless of how small those intervals are. In other words, the speed of the object remains constant.

2. **Analyzing the Ball's Motion**:
- When a ball is thrown vertically upwards, it initially moves with a certain velocity (let's say 'v' meters per second).
- As the ball rises, it is acted upon by the force of gravity, which pulls it downwards.

3. **Effect of Gravity**:
- The gravitational force (mg, where m is mass and g is the acceleration due to gravity) causes the ball to decelerate as it moves upwards.
- This means that the speed of the ball decreases until it reaches its highest point.

4. **Reaching the Highest Point**:
- At the highest point of its trajectory, the velocity of the ball becomes 0 m/s. This is the point where the ball stops moving upwards before it starts to fall back down.

5. **Conclusion on Motion**:
- Since the ball's speed is not constant (it decreases as it goes up), the motion cannot be classified as uniform.
- Therefore, the statement that "a ball thrown vertically upwards has uniform motion throughout" is **False**.

### Final Answer:
The answer is **False**. The motion of a ball thrown vertically upwards is non-uniform due to the effect of gravity.