# Simulation - Force and Energy

## Normal Force

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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.

## Sliding Down an Incline

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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 $1kg$.

## Friction

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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.

## Work

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Drag the arrows or the box.
Observe how the sign of work changes and when the work vanishes.
Calculations will appear here.

## Centripetal Force

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

## Collision and Conservation of Momemtum

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

## Center of Mass

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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.