A rubber ball dropped from a certain height is an example ofa)uniform accelerationb)uniform retardationc)uniform speedd)non-uniform speedCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Non uniform motion....as when a ball comes nearer to the ground ...force of gravitation works more on it...so it's speed increases ...thus when it's drooped it has less speed and when it comes nearer to ground then it has more speed. So, answer is D

Answer

A rubber ball dropped from a certain height is an example of uniform acceleration which is equal to gravity i.e.9.8m/S2.

Answer

Answer:

To understand why a rubber ball dropped from a certain height is an example of non-uniform speed, let's first define the terms involved:

1. Uniform acceleration: This refers to a situation where an object's velocity changes by the same amount in each unit of time. In other words, the object's speed increases or decreases at a constant rate.

2. Uniform retardation: This is similar to uniform acceleration but specifically refers to a situation where the object's velocity decreases at a constant rate.

3. Uniform speed: This refers to a situation where an object's speed remains constant over time.

4. Non-uniform speed: This refers to a situation where an object's speed changes irregularly over time. It can increase, decrease, or vary in different intervals.

Now, let's analyze the scenario of a rubber ball being dropped from a certain height:

Gravity's effect on the ball:
When the rubber ball is dropped, it is acted upon by the force of gravity. The force of gravity causes the ball to accelerate downwards due to the Earth's gravitational pull. The acceleration due to gravity is approximately 9.8 m/s^2.

The ball's velocity:
As the ball falls, its velocity increases due to the acceleration caused by gravity. Initially, when the ball is dropped, it has zero velocity. However, as it falls, its velocity increases at a constant rate due to the uniform acceleration caused by gravity.

The ball's speed:
While the ball's velocity increases uniformly, its speed does not. This is because speed is the magnitude of velocity and does not consider direction. In the case of the rubber ball, its speed increases irregularly. It starts from zero and continuously increases as it falls, but the rate of increase is not constant. The ball's speed is affected by factors such as air resistance, which causes the speed to change irregularly. Therefore, the rubber ball dropped from a certain height is an example of non-uniform speed.

In conclusion, when a rubber ball is dropped from a certain height, it experiences uniform acceleration due to gravity, resulting in an increase in velocity over time. However, its speed does not increase uniformly due to factors like air resistance, causing the speed to change irregularly. Therefore, the correct answer is option 'D' - non-uniform speed.

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