Force
Newton's Laws
Balance and Stability
Motion
Levers
100
A force is a ____ or a _____ when two objects interact.
A force is a push or a pull when two objects interact.
100
Newton's First Law of Motion is also known as the 'Law of ______'
Law of Inertia
100
Is an object with greater mass more or less stable than an object with less mass?
More stable.
100
The four main types of motion are:
- linear
- curvilinear
- angular
- general
100
Which type of lever is this?
- 3rd Class Lever
200
Forces can be seperated into two broad categories based on where and how they are generated. These are:
- Internal forces
- External forces
200
Newton's Second Law of Motion states that Force = ____ x _______.
Force = Mass x Acceleration
200
The two types of balance are:
- static balance (when the body is stationary)
- dynamic balance (when the body is moving)
200
The trajectory of every projectile is affected by these two external forces:
- gravitational force
- drag force (air resistance)
200
Which type of levers are most widely used in sport or physical activity?
- 3rd Class Levers
300
Although the majority of the forces experienced by athletes during sport and physical activity are contact forces, the most common non-contact force acting on athletes is ______________ force.
- gravitational
300
Newton's Third Law states that "for every ______ there is an equal and opposite ______."
Newton's Third Law states that "for every action there is an equal and opposite reaction."
300
The balance of a person or object is maintained when the ________ falls within the __________________.
The balance of a person or object is maintained when the line of gravity falls within the base of support.
300
The three factors which determine how far a projectile travels are:
- angle of release
- speed of release
- height of release
300
Where is the Fulcrum, the Load, and the Resistance?
Fulcrum = shoulder
Load (resistance) = ball hitting racquet
Effort (force) = arm muscles
400
The type of contact force generated by the surface of two objects rubbing against each other. This is why a lawn bowl slows down as it approaches the jack. This slowing is due to ___________ force.
- Friction
400
Explain why people or objects that are in motion will always eventually slow down or change direction.
Because gravitational force, drag force, and friction force are constantly acting on them.
400
The ability of a person or thing to maintain balance and stability is dependent on...
- base of support
- centre of gravity
- line of gravity
- mass
400
A lawn bowl draw is an example of which type of motion?
- curvilinear
400
Why is a tennis racquet considered a 'speed multiplier'? Why does this result in greater force?
It increases the resistance arm (makes it longer), meaning a greater speed can be achieved.
F = m x a (greater acceleration, greater force)
500
The sequential combination of forces produced by different parts of the human body acting together to maximise force production is known as ____________ __ ____________.
Summation of forces.
500
The jack remaining stationary at the head-end, until it is struck by a bowl, is an example of which of Newton's Laws?
- Newton's First Law
500
Comment of how you would want to manipulate your centre of gravity and your base of support if wanting to achieve greater stability.
- lower centre of gravity
- increase size of the base of support
500
The optimal angle of release for projectiles thrown from the arm is between _____ and _____ degrees.
35 and 45 degrees.
500
What are the 5 elements of any lever?
- A fulcrum (pivot point)
- An effort point - the point on the lever where effort (or force) is applied by the muscles
- The load point - the point of the lever where the load (resistance) is applied, it can be the mass of an object to be moved
- Effort arm - between fulcrum and effort (force)
- Resistance arm - between fulcrum and load