Understanding Newton's Laws of Motion
An object in motion stays in motion and an object at rest stays at rest unless acted upon by an external force.
What is Newton's First Law
Travelling a distance of 100km over 2 hours.
What is 50 km/hr?
A term to describe when an object stops accelerating when it is falling through the Earth's atmosphere.
What is terminal velocity?
Increasing this variable for an object proportionally increases how much air resistance will affect it.
What is surface area?
A tool that is made from combining two (2) or more simple machines.
What is a complex machine?
Newton's third law states that for every action there is an equal and ____________ __________.
What is opposite reaction?
Speed with a direction vector.
What is velocity?
The force that stops gravity from pulling grounded objects into the centre of the Earth.
What is normal force?
A measurement for force that a person on the Moon has less of, compared to a person on Earth.
What is weight?
This type of simple machine are the ends of a fork or the blades of scissors.
What is a wedge?
Force = Mass x Acceleration
What is Newton's Second Law?
The rate that an object changes speed and/or direction.
What is acceleration?
A category for the forces that act over distance through a force field.
(No, not the Star Wars type!!)
What are non-contact forces?
When the net force acting on an object is > 0, the forces are described as this.
What is unbalanced?
A type of simple machine, best at overcoming the weight of a heavy object that needs to be moved.
What is an inclined plane?
When forces on and object are balanced (net force of 0) they are considered to be in this state.
What is equilibrium?
The formula for calculating speed.
What is distance divided-by time?
A symbol used to represent all the (significant) forces acting on an object.
Hint: they must be ruled, straight, and labelled :)
What are free-body diagram arrows?
A spaceship travelling through space is unaffected by this force.
What is air resistance?
What are pulleys?
The tendency for an object in motion to resist a change to its motion
(Hint: _ _ _ _ t _ _).
What is Inertia?
The lack of this force explains why it is difficult to run on ice versus grass.
What is friction?
A side-effect of friction (and a type of energy).
What is heat?
The term for the advantage resulting from using machines to do work.
(Hint: ________ advantage)
What is mechanical advantage?