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# Physics

### First Half

What is accuracy? How close your measurement is to an accepted value.
What is precision? Your ability to get similar measurements in a row.
What is the SI prefix for 100? Centi
What is a vector? A magnitude with a direction.
An object's velocity is graphed, what can be determined from its slope? Its acceleration.
What is the path of a projectile called? A trajectory
When is the sum of two vectors zero? When the of magnitude of each is equal and opposite.
Define force. A push or pull.
What is the weight of a 1kg object? 9.81N
What is the stickiness between two sliding surfaces? The coefficient of kinetic friction.
Define work. Force done over a distance.
Does a penny falling at 20,000mph have much inertia? No, it does not have much mass.
Kinetic energy is also equal to what? Net-Work. Also, the initial potential energy is equal to the final kinetic energy.
Power is measured in what? Watts.
In inelastic collisions, kinetic energy is __ _______. Not conserved.
Elastic potential energy is Energy stored when deforming object.
Work, Potential energy, and Kinetic Energy, are measured in what? Joules (J)
Equilibrium is... When net force is zero.
What is Newton's first law? Law of inertia. This resist changes in motion
What is Newton's second law? Force is equal to mass multiplied by acceleration.
What is Newton's third law? Every action has a equal and opposite reaction. (wall pushes back if you lean on it)
What happens to kinetic energy when velocity is multiplied by 4? KE=1/2*m(4v)^2 KE=1/2*m16v KE=8*m It is multiplied by 8.
Created by: 1697206783893728