Physics · Circular Motion
Suppose a small ball tied to a string is being whirled in a horizontal circle at a steady speed. Why is this type of motion classified as accelerated motion?
- 1Because the direction of the ball's movement is constantly shifting, which changes its velocity.✓
- 2Because the tension in the string causes the mass of the ball to increase during rotation.
- 3Because the speed must increase continuously to keep the ball in a circular path.
- 4Because the kinetic energy of the ball is not conserved during the circular movement.
Correct answer
Because the direction of the ball's movement is constantly shifting, which changes its velocity.
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