Which of the following is an example of non-uniform motion?

A. Movement of an asteroid

B. A car coming to a halt

C. A bouncing ball

D. All of these

To determine which of the options represents non-uniform motion, we first need to clarify what non-uniform motion means. Non-uniform motion occurs when an object travels at varying speeds or changes direction over time. Let’s analyze each option to see which fits this definition.

Analyzing the Options

Movement of an Asteroid

The movement of an asteroid can be quite complex. Asteroids often travel in elliptical orbits around the sun, which means their speed can change depending on their position in the orbit. When they are closer to the sun, they move faster due to gravitational pull, and when they are farther away, they slow down. This variation in speed qualifies it as non-uniform motion.

A Car Coming to a Halt

When a car is coming to a stop, it is decelerating, meaning its speed is decreasing over time. This change in speed indicates that the car is not moving uniformly. Instead, it is transitioning from a higher speed to a complete stop, which is another example of non-uniform motion.

A Bouncing Ball

A bouncing ball also exhibits non-uniform motion. When a ball is dropped, it accelerates due to gravity until it hits the ground, then it decelerates as it bounces back up. The speed changes throughout its motion, making it a clear example of non-uniform motion.

Conclusion on the Options

Now, let’s summarize what we’ve found:

• The movement of an asteroid is non-uniform due to its changing speed in orbit.
• A car coming to a halt is non-uniform because it slows down over time.
• A bouncing ball is non-uniform as it accelerates and decelerates during its motion.

Given that all three options exhibit characteristics of non-uniform motion, the correct answer is D. All of these.