Drag on the ground to tilt.
Drag on the blue arrow (the applied force) to change, or click "Remove Applied Force" to remove.
The red arrow represnts the total force.

Drag on the surface of the incline to change the angle.
The force diagram can also be dragged to a different location.
The length of the track is \(20m\). The mass of the block is \(1kg\).

Drag on the surface of the incline to change the angle.
The force diagram can also be dragged to a different location.
The applied force can be adjusted by the slider. Click the "Play" button to see the motion.
We assume \(\mu_s = \mu_k \) (static and kinetic coefficients of friction) for simplicity.

Terminal Velocity

• Play to see how the ball reaches a stable terminal velocity over time.
• Try to increase the drag or the weight suddenly and observe the effects on the velocity.
• Increasing the drag is similar to someone opening his parachute in flight.
• The model we use for the drag force is $F_{drag} = k v^2$. In reality the equation will depend on many factors, such as the surface area of the object, viscosity of the fluid, ...etc.

Drag the arrows or the box.
Observe how the sign of work changes and when the work vanishes.

Adjust the sliders to see how the trajectory is affected.
Can you calculate the radius of the trajectory?

Drag on the mass to change its position. Click "Play" to start the oscillation.

For completely inelastic collision, slide the Elasticity slider to 0%.

Drag more masses out from the box on the top right hand corner. Drag back in to remove a mass.
The mass of each object can be changed by selecting it and then dragging on the slider.