Question

A group of students designed an experiment with a thread and a rubber stopper. The steps of the experiment are listed below. 1. Tie a rubber stopper to one end of a 20 cm long thread. 2. Hold the other end of the thread and whirl it in a circle five times. 3. Allow the thread to wind up on the finger. 4. Observe that the rubber stopper moves faster as it comes nearer to the finger. The experiment most likely demonstrates (2 points) Question 5 options: 1) Kepler's first law of planetary motion 2) Kepler's second law of planetary motion 3) Newton's second law of motion 4) Newton's third law of motion

Answer 1

Answer:

Kepler's second law of planetary motion

Explanation:

Kepler's second law of planetary motion describes the speed of a planet traveling in an elliptical orbit around the sun. It states that a line between the sun and the planet sweeps equal areas in equal times. Thus, the speed of the planet increases as it nears the sun and decreases as it recedes from the sun.

Answer 2

Answer:

The experiment most likely demonstrates Kepler's first law of planetary motion.

Explanation:

• The law of elliptical orbits given by Johannes Kepler states that the planets that revolve around the sun form an elliptical orbit. He clarifies that shorter the orbit, the lesser is the time taken by the planet to complete the revolution.
• The same principle seems to be applicable here in the experiment done by the students. As the distance of the rubber stopper from the finger goes on decreasing, the time taken by the rubber stopper to complete a revolution is decreased (and the speed is increased).