Master of Mass
What is the amount of matter in an object?
Mass
A force is defined as a stress that takes the form of these two actions.
A push or a pull.
This is the force of gravity acting on an object's mass.
Weight
These are stresses that act on a structure from the outside.
External forces
This internal force stretches a material by pulling its ends apart.
Tension
What is the standard metric unit used to measure mass?
Kilogram (kg)
What is the standard unit of force?
The Newton (N)
Who determined that a gravitational force exists between any two objects in the universe?
Isaac Newton
This type of load is a permanent force, such as the weight of the structure itself.
Dead load
This internal force crushes a material by squeezing it together.
Compression
True or False: Your mass changes when you travel from Earth to the Moon. You must explain why!
False (the amount of matter stays the same wherever you are in the universe)
To fully describe a force, you must determine these two characteristics.
Its size and its direction
Gravitational force depends on these two factors.
The masses of the objects and the distance between them
Wind, snow, and the weight of people in a building are examples of this non-permanent load.
Live load
This force twists a material by turning its ends in opposite directions
Torsion
What specific scientific instrument is used to measure an object's mass?
A balance
What device is specifically used to measure the amount of force?
A force meter or a spring scale
On Earth, every 1 kg of mass has a gravitational pull (weight) of how many Newtons?
9.81 N
What term describes the change in shape or size of an object due to applied forces?
Deformation
This happens when compression and tension act together, squeezing one side of a material while stretching the other.
Bending
There are 1,000 milligrams in 1 gram; how many grams are in 1 kilogram?
1,000 grams
In a force diagram, what does the length of the arrow represent?
Why do you weigh slightly less on a mountain top than at sea level?
Because you are farther away from the Earth’s center, and gravitational force decreases with distance
Most structures are designed to withstand live loads that are how many times larger than expected?
Two to three times larger
This force bends or tears a material by pressing different parts in opposite directions at the same time.
Shear