remains constant
Uniform Circular Motion Speed Analysis
Uniform circular motion describes the movement of a body in a circular path at a constant speed. While the direction of the body's velocity vector changes continuously, the magnitude of this vector, which is the speed, remains unchanged.
Understanding the Options
- Option 1: Changes continuously - Incorrect. In uniform circular motion, the speed is constant. The velocity changes due to the changing direction.
- Option 2: Depends on the radius only - Incorrect. Speed in uniform circular motion is independent of the radius, although the angular velocity might relate to radius for a given tangential speed.
- Option 3: Remains constant - Correct. This is the defining characteristic of uniform circular motion regarding speed. The magnitude of velocity is constant.
- Option 4: Becomes zero at every point - Incorrect. If the speed were zero, the body would not be moving.
Conclusion
For a body undergoing uniform circular motion, its speed is constant by definition. The velocity vector changes direction but not magnitude.
Important Questions from Circular motion
A particle is moving in a circle with uniform speed. It has constant
Suppose a boy is enjoying a ride on a merry - go -round which is moving with a constant speed of 10 ms-1. It implies that the boy is -
The circumference of a planet is 36,000 km. If the planet makes no other movement and takes 20 hours for one complete rotation, what is the speed of a point on its equator?
In a chamber, a uniform magnetic field of 4.5 G (1G = 10-4 T) is maintained. An electron is shot into the field with a speed of 4.8 × 106 m/s normal to the field. Find the radius of the circular orbit? Also obtain the frequency of revolution of the electron in its circular orbit? (e = 1.6 × 10- 19 C, me = 9.1 × 10-31 kg) choose an approximate value
- Which of the following is an example of uniform circular motion in daily life?
