Motion
A car travelling 60km/h...This is an example of?
Speed
T or F...a wider base of support promotes stability?
True
What causes an object to sink?
When the density of the object is greater than the density of the displaced water
Newton's Third Law is?
What is the formula for momentum?
Mass x Velocity
The further the centre of gravity from the base...
The more unstable is the body or object
Fluid Mechanics are concerned with properties of gases and liquids...what are these gases and liquids?
Water and air
Kicking a ball at rest is an example of which law?
Newton's First Law
What is Linear Motion?
Linear motion occurs when a body and all parts connected to it travel the same distance, in the same direction and at the same speed.
Centre of gravity?
Object is the point at which all the weight is evenly distributed and about which the object is balanced force concentrated at a single point
What is Drag?
Drag is the force created by a fluid or gas to resist the motion of an object through it
What kind of resistance effects the motion of soccer ball being passed on the ground?
Grass - Friction
What is acceleration and how can it be improved?
1. The capacity to gain speed/A change in velocity is known as acceleration
2. Resistance Running
Line of gravity?
Imaginary vertical line passing through the centre of gravity and extending to the ground. More stable if the line of gravity is through the centre of base of support.
Why is it important for swimmers to float about the water when swimming?
The higher an object floats in the water, the less resistance there is --> helps the swimmer to push through the water faster and with more power --> exhausting less energy
List 3 reasons why Newton's Laws are important in sport?
What is velocity?
Velocity is the rate of change of an object relative to its direction of movement
To increase the stability of the body you can..? List 3
Increase the area of your support base, lower your body position, increase mass, move your line of gravity
Why does the tear drop have the smallest turbulence?
Aerodynamic shapes reduce this pressure drag by minimizing that difference in pressure and allowing the air to flow more smoothly over your front and reduce the low-pressure wake behind you (Profile Drag). --> It is streamlined
What is Newton's 2nd Law?
The acceleration of an object is directly related to the net force and inversely related to its mass