A body moving in a circular path with constant speed has?
- Constant acceleration
- Constant retardation
- Variable acceleration
- Variable speed and constant velocity
Explanation
A body moving in a circular path with constant speed has variable acceleration.
While the speed remains constant, the direction of the velocity vector is constantly changing as the body moves around the circle.
Since acceleration is the rate of change of velocity, and velocity is changing (even though speed is constant),
The body experiences a constant magnitude of acceleration
But the direction of that acceleration changes at every point on the circle.
This makes the acceleration variable.
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- 280,000 km/s
- 300,000 km/s
- 320,000 km/s
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