| What does friction do? | Slow down moving objects. Acts against them in the opposite direction |
| What happens if the acceleration force is bigger/equal/smaller? | Bigger = the object will accelerate
Equal = the object will stay at a constant pace
Less = the object will decelerate |
| Is friction a contact or a non contact force? | Contact force. Friction is on the surface that's in contact with the tyre. |
| What is Terminal Velocity? Use it when saying what happens to a falling object decently high | When objects fall, they accelerate as because their weight via gravity is bigger then the air resistance.
However the both of them are directly proportional [R=K x V] meaning acceleration slows down, until you balance the forces, meaning no acceleration.
The object has reached its maximum velocity, Its Terminal Velocity. |
| What happens when the parachute is deployed. | The Parachute greatly increases air resistance, even making the guy fly up for a bit.
However since their both linked, the air resistance will also go down gradually, soon matching with weight. This makes a new Terminal Velocity |
| Why does Deploying a parachute slow down things? | This is because of drag. When you skydive without a parachute, your terminal velocity is much higher as your drag has to match your weight.
Parachutes increase your air resistance, because it has created a larger surface area for drag to act upon. Your terminal velocity becomes much lower, low enough to land safely.
Decreasing drag = Bigger Terminal Velocity |
