Interactive simulation of the fundamental principles of motion
"An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force."
Observe how the block behaves with and without an initial push, and with/without friction.
"The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. The direction of the acceleration is in the direction of the net force." (F = ma)
Resulting Acceleration (a = F/m): 5.00 m/s²
Change force and mass, then apply force. The object will accelerate for a short duration.
"For every action, there is an equal and opposite reaction."
Click "Launch Rocket". The rocket expels gas downwards (action), and the gas pushes the rocket upwards (reaction).