AS: External Forces Flashcards
1
Q
What are the 4 external forces acting on a performer?
A
Weight and reaction (Vertical)
Friction and air resistance (Horizontal)
2
Q
Definition of weight
A
The gravitational pull of a body towards the Earth
3
Q
Definition of reaction
A
The equal and opposite force exerted by a body in response to the action force placed upon it
4
Q
Definition of friction
A
The force that opposes the motion of two surfaces in contact
5
Q
Definition of air resistance
A
The force that opposes motion through the air
6
Q
What are all 4 external forces measured in?
A
Newtons
7
Q
What factors affect friction?
A
Roughness of ground surface
Roughness of contact surface
Temperature
Size of normal reaction
8
Q
What factors affect air resistance?
A
Velocity
Shape
Front cross-sectional area
Smoothness of surface
