Chapter 9, Motion and Force, 9.3 Terminal Speed

(As the speed increases the friction increases)

1.

• Small Velocity
• Resultant force= mg-Fr 
• Resultant force will be a large value
• Therefore there is a large acceleration

2.

• Faster Velocity
• Resultant force= mg-Fr
• Resultant force will be a smaller value
• Therefore there is a smaller acceleration.

3.

• Fastest Velocity
• Resultant force= mg-Fr
• Resultant force will be 0
• Therefore there is zero/no acceleration
• It has now hit "Terminal Velocity"

4.

• Friction has incresed a, as the parachute has a larger surface area.
• Resultant force= Fr-mg
• Therefore the resultant force is large, and upwards.
• Therefore the acceleration is large, but upwards, so it is decelerating (or has negative accelleration)

5.

• Smaller Velocity
• Resultant force= Fr-mg
• Resultant force is zero
• Therefore there…