Physics Midterm MC
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20 Terms
Precision
The degree of exactness of a measurment or the repeatability of measurements under unchanged conditions.
Accuracy
The closeness of a measured value to a standard or true value.
Vectors
Quantities that have both magnitude and direction.
Scalars
Quantities that have only magnitude and no direction.
Kinematics
The branch of mechanics that describes the motion of objects without considering the causes.
Free Fall Kinematics
The motion of an object under the influence of gravity alone, ignoring air resistance.
Weight
The force exerted by gravity on an object, calculated as mass times the acceleration due to gravity.
Equilibrium
A state in which the net force acting on an object is zero, resulting in no change in motion.
Force of Gravity
The attractive force between two masses, commonly measured as the weight of an object.
Coefficient of Friction
A value that represents the frictional force between two bodies in contact.
Newton’s Laws
A set of three laws that describe the relationship between the motion of an object and the forces acting on it.
Projectiles Fired Horizontally
Objects launched parallel to the ground, affected by gravity and air resistance.
Projectiles Fired at an Angle
Objects launched at an angle, resulting in parabolic motion due to gravity.
Acceleration Timer
A device that measures how quickly an object's velocity changes over time.
Weight Equation
Weight (W) is calculated as W = m*g, where m is mass and g is acceleration due to gravity.
Instantaneous Velocity
The velocity of an object at a specific moment in time.
Coefficient of Friction Equations
Formulas that relate the force of friction to the normal force and the coefficient of friction.
Period
The time taken for one complete cycle of motion or oscillation.
Distance vs Time Graph
A graphical representation that shows how distance changes over time.
Velocity vs Time Graph Relationship
A graphical representation showing how an object's velocity changes over time, with the slope representing acceleration.