Science Secrets · Drawing 02 of 40
The Toy That Kept Going
Forces and Movement
The cart stops, but the ball keeps moving. A moving object tends to keep going. A force is needed to change its motion.
Did you know?
This tendency is called inertia.
Look together
Why does the ball move beyond the cart?
An idea to try
With an adult, put a ball on a small cart. Roll it gently toward a padded stop and watch the ball.
For the adult reading along
A little more to discover
The stop applies a force to the cart. The ball keeps moving until other forces stop it. The scene shows a small low-speed test.
Sources and illustration notes (1)
Simplified scene and shapes. Models, imagined comparisons and enlargements do not preserve all real measurements.
These links lead to other websites. Explore them with an adult. References identify the institution and the related lesson; some linked pages are in French.
- Science World: ForcesThe trolley stops, but the ball keeps moving. A moving object tends to keep going. A force is needed to change its motion.
Source review: 2026-10-12. Illustrations are simplified for colouring.
