Mon Prof Augmenté
Pulled Steel Ball on a Ramp
Age 16 · Science
A steel ball sits in a straight groove while a falling weight pulls it through a cord. The stretched spring and the ball’s changing motion show how a non-zero resultant force changes velocity.
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Age 16: open this week
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In the picture
- Steel ball in the groove: the object whose velocity changes under a pull
- Stretched coil spring in the cord: a taut link that transmits the pull
- Hanging metal weight: the source of the steady downward pull
- Small pulley at the ramp end: a wheel that changes the cord’s direction
Examples
- Pedalling a bicycle to speed up on a straight path
- Braking a car to slow it down on a straight road
Key takeaways
- A non-zero resultant force makes a body accelerate, changing its speed or direction.
- The acceleration points along the resultant force and grows with the force for the same mass.
Quiz: Pulled Steel Ball on a Ramp (Age 16)
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What does a non-zero resultant force do to a body?
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If the same mass is pulled by a larger resultant force, what happens to its acceleration?
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In which direction does a body’s acceleration act?
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