Definitions
More definitions
Examples
more examples
GOOD LUCK
100
What is a force?
A force is a push or a pull
100
What is an external force?
A force that acts on an object from the outside
100
Give an example of a natural structure?
Mountain, rocks, trees, etc. Anything occurring naturally in nature.
100
What kind of structure is this?
Frame structure
100
Name two types of structures that could describe the human body
Solid & frame
200
What is a structure?
A structure is defined as something made up of parts that are together in a particular way for a specific purpose or purposes
200
Define action-at-a-distance forces
Action-at-a-distance forces are forces that act on an object without touching it
200
Example torsion and provide an example
Torsion is the internal force that occurs from twisting an object in opposite directions. Examples include: wringing out a cloth, turning a screwdriver, or "contortionist" (but that doesn't really count)
200
Which internal force is acting in this picture?
Tension (pulling in opposite directions)
200
What is the force of gravity on Earth? Is it always the same?
9.8 N/Kg. As long as we are on Earth, the force of gravity is always the same.
300
What is the difference between a frame, shell, and solid structure?
Frame: Rigid parts that form a framework
Shell: Hollow on the inside & protect things from the outside
Solid: One solid material or a pile of materials to form a shape
300
What is a manufactured structure?
A structure that is man-made (it doesn't occur naturally on earth)
300
A sock is stuck to a sweater when it comes out of the dryer
Is this a contact force or an action-at-a-distance force?
Action-at-a-distance (static electricity)
300
Identify a structure AND a system in this picture
(picture of a car with the hood open)
The car itself is a structure, and the engine is a system
300
Why does a water bottle fall over if I push on the top of it, but slide if I push on the bottom of it?
When you push on the bottom of an object, there is more weight above the point of application which holds the object down.
400
What is shear force? How does it work?
Shear force pushes two things against eachother in opposite direction. Ex. Scissors
400
What is friction?
A force that opposes the relative motion of an object
400
Kyle wants to know how much gravity is acting on couch where Omar sits, which is 48 kg. What is the force of gravity?
Fg = mass x gravity
= 48 x 9.8
= 470.4 N
400
What does it mean if the wind applies a large magnitude of force against a tree? What might happen to the tree?
The tree is being hit by a large amount of force. It may fall over or become damaged.
400
What happens when an object's centre of gravity is outside of the base of the object?
If the centre of gravity is outside of the base of an object, it will fall over.
500
What is a static load?
The static load is the effect of gravity on a structure
500
What is the point of application?
The exact spot on an object where force is being applied
500
If a soccer ball is kicked across a field, what kind of energy does it have?
Kinetic energy (energy from movement)
500
What is a social system?
A 'system' that is not a physical system. It is a system created by people, such as a school or a business.
500
What is the difference between mass and weight?
Mass is the amount of matter in an object. Weight is the force that gravity pushes on the object.