Physics
Which of the following is an example of uniform circular motion?
- a car accelerating on a straight road
- a pendulum swinging back and forth
- a satellite orbiting the earth at a constant altitude
- a ball rolling down a hill
Answer
a satellite orbiting the earth at a constant altitude
Reason —
A satellite orbiting the Earth at a constant altitude experiences uniform circular motion because it maintains a constant speed while continuously moving along a circular path around the Earth.
The car moving along a straight path and may be changing its speed, but it is not following a circular path.
A pendulum exhibits periodic motion as it swings back and forth due to gravity but it is not circular motion.
The ball is rolling along a sloped path, not a circular one.
Related Questions
Centrifugal force is :
- a real force
- the force of reaction of centripetal force
- a fictitious force
- directed towards the centre of the circular path
The difference between centrifugal force and centripetal force is :
- they both act in the same direction
- they both act in opposite direction
- they both have different magnitudes
- none of the above
Is it possible to have an accelerated motion with a constant speed? Name such type of motion.
Give one example of motion in which speed remains uniform, but the velocity changes.