P8 Flashcards
What is displacement
Distance without change of direction/ distance in a certain direction
What are vectors
It gas magnitude and direction
What is a scalar
A scalar only has magnitude
What do arrows represent on diagrams
Direction and magnitude
What does Newton’s fifth law of motion state
When two objects interact they exert equal and opposite force on each other
For force what unit is used
Newton’s
What can force do
It can change the shape of an object or its motion
What is the resultant force
It is a single force that has the same effect as all the forces acting on it
What will happen if the resultant force on an object is zero
The object will stay the same
What will happen if the resultant force on an object is greater than zero
The speed or direction of the object will change
If two forces act on an object along the same line the resultant forces will be
Their sum if they act in the same direction
Their difference if they act in opposite directions
What is the moment of a force
A measure of the turning point on an object
What is the equation for moment
Moment = Distance from pivot times the force acted on the object
What are levers used for
They are used to exert a force that is greater than the effort
What is a lever used for
It is used as a force multiplier, it will exert a greater force than the force applied to the le verb by the effort
