Term

Definition
a push, pull or twist on an object resulting from the object's interaction with another object 


Term

Definition
as a result of an interaction 


Term

Definition
change in shape start moving/stop moving accelerate/decelerate 


Term
difference between contact and noncontact force 

Definition
contact: forces that are exerted through the direct contact of two or of two or more surfaces. EG pushing a trolley
noncontact: do not require any physical connection. EG gravity pulling down an object 


Term
unit used to measure force 

Definition
newton (N) > the composite of mass and acceleration 


Term
equipment used to measure force 

Definition
a force meter, otherwise known as a newton spring balance a dynometer 


Term
How to represent forces in a diagram 

Definition
Gravity: F(G) the magnitude is usually 9.8m/s2 Normal: F(N) the magnitude when balanced is equal to gravity Tension: F(T) the magnitude is any (up to breaking load) Friction: F(Fr) the direction is opposed to relative motion 


Term

Definition
a quantity that has both magnitude and direction. for example if you throw a ball TWICE AS HARD and to the LEFT.
A force is a vector quantity because to fully describe it you must describe both the magnitude and direction. 


Term

Definition
a state in which all influences acting on an object cancel each other out so that a balanced equation results. 


Term
what happens to an object when forces are not in equilibrium? 

Definition
an objects motion will change in the direction of the superior force 


Term
Newton's First Law of Motion 

Definition
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Often referred to as the law of inertia. 


Term

Definition
The tendancy of an object to resist any changes to its motion 


Term
Example of Newton's First Law of Motion 

Definition
A stationary object will resist changes to its motion by remaining stationary. 


Term
Newton's Second Law of Motion 

Definition
The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object). 


Term

Definition
The force acting on an object is equal to the mass of the object times its acceleration.
The force is measured in Newtons, the acceleration is measured in m/s/s and the mass is measured in kilograms. 


Term
Newton's Third Law of Motion 

Definition
For every action, there is an equal and opposite reaction. 


Term
Examples of Newton's Third Law of Motion 

Definition
When you sit on a chair your body acts on the chair with one force and the chair reacts with another force on you. 


Term

Definition
The weight of an object is the force of gravity on the object and may be defined as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton.
The mass of an object is the quantity of matter in an object. 


Term
Define work and give examples 

Definition
Work is done when a force acts on an object over a distance. It is also done when energy is transformed. 


Term
How do you find the work done? 

Definition
Work=force x distance (or displacement) 


Term

Definition
The rate at which work is done. 


Term
How do you find the power? 

Definition


Term

Definition
The energy an object possesses due to its motion. 


Term

Definition
The energy an object has due to its position in a force field or that a system has due to its configuration. 


Term
Formula for kinetic energy 

Definition


Term
Formula for potential energy 

Definition


Term
Types of potential energy 

Definition
Gravitational potential energy, chemical potential energy or elastic potential energy 


Term

Definition
The sum of all the forces acting on an object 


Term

Definition
A substance that has inertia and occupies physical space 

