Description :

This page helps you explore Newton’s laws of motion in an easy and interactive way.
    You can try out how three objects with different masses move when a force is applied. The motion takes place on a flat surface with no friction and no gravity. The masses are set in the ratio metal sphere : stone sphere : wooden sphere = 4 : 2 : 1, and all collisions are perfectly elastic (coefficient of restitution = 1). The names of the materials are only labels—their motion depends only on their mass.
    To apply a force to an object, check its box in the control panel at the bottom. A small marker will appear at the center of the object. Drag this marker, and a “hand” will appear to pull the object, just like stretching a rubber band. The blue arrow shows the force vector. After you stop dragging, a restoring force still acts toward the marker, depending on the distance. Try pulling in different directions and see how the motion changes. If you uncheck the box, the force disappears. The object will then move in a straight line at constant speed unless it hits a wall or another object.
    You can also show velocity and acceleration vectors using the vector display checkboxes. The green arrow is the velocity vector, and the red arrow is the acceleration vector.
    Try different settings and motions, and observe how mass, force, acceleration, and velocity are related. You can also explore how mass affects the period of simple harmonic motion and circular motion.

● Use the checkboxes in the control panel to select an object. By dragging the selection marker, you can control the force applied to that object.
● By checking the boxes in the Vector Display section, you can show the velocity and acceleration vectors. The green arrow shows velocity, and the red arrow shows acceleration.
● Unchecking the “Sound” box turns off the collision sounds.
(Note: Some browsers may not play collision sounds.)

● The “Reset” button returns everything to the initial state.

Copyright 2025 KATO, Noriyoshi