7 Questions
In the context of circular motion, what is the role of centripetal force?
Bends the path of the particle into a circular trajectory
If a string attached to a ball moving in a circular path snaps, what does the ball do?
Follows a straight line path
Which force prevents a ball from moving in a straight line when it is attached to a string and moves in a circle?
Centripetal force
What happens to a ball's path when the centripetal force acting on it is removed?
It becomes a straight line path
Which of the following is an example of centripetal force in action?
Force keeping a satellite in orbit
What type of motion does a particle in circular motion exhibit when there is no centripetal force present?
Linear motion at constant speed
How does centripetal force affect the velocity of a particle moving in a circle?
Changes the direction of velocity
Study Notes
Centripetal Force
- Centripetal force is the force that bends the normally straight path of a particle into a circular path.
- Without centripetal force, a particle will move in a straight line, not a circular path.
- Examples of centripetal force include:
- Force acting on electrons in fixed orbits around the nucleus.
- Force acting on artificial and natural satellites.
- Force acting on earth around the sun.
Centripetal Acceleration and Force
- Consider a particle moving in a circle of radius 'r' with uniform speed v.
- The acceleration of the particle is a = Δv / Δt, where Δv is the change in velocity and Δt is the time required to move from one point to another.
- Since the speed of the particle is constant, the velocities at points A and B are v₁ and v₂, respectively.
- The centripetal force is responsible for the centripetal acceleration, which is necessary for the particle to maintain its circular motion.
This quiz focuses on explaining centripetal force in circular motion and deriving the relation for it. It covers the concept of a force that redirects the path of an object into a circular trajectory. The quiz also explores scenarios where the centripetal force is necessary to maintain circular motion.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
