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eSci Physics
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Gravity
Terms in this set (18)
Displacement
The difference between the initial position and the final position of an object; measured in meters (m); vector quantity
Scalar
a physical quantity that has magnitude but no direction
Vector
A quantity that has magnitude and direction
Velocity
The speed of an object in a particular direction; vector quantity; measured in m/s
acceleration
rate of change of velocity; vector quantity; measured in m/s^2
Force
A push or a pull; Vector quantity; measured in Newtons
Energy
The ability to do work; Scalar quantity; Measured in Joules
Work
A result of a force moving an object a certain distance; W=Fd; measured in Joules
Newton
The SI unit of force; 1 N = (1 kg x m)/s^2
Joule
SI unit of energy
Newton's 1st Law
An object at rest will remain at rest, an object in motion will remain in motion unless acted upon by a force
Newton's 2nd Law
Force = mass x acceleration
Newton's 3rd Law
For every action there is an equal and opposite reaction
Inertia
The tendency of an object to resist a change in motion
Kinetic Energy
Energy of motion
Potential Energy
Stored Energy; PE = mgh
g
acceleration due to gravity; -9.81 m/s/s
Vectors vs Scalars
See image
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