Physics QE Flashcards
Product of mass of the object and its velocity
Linear Momentum
SI Unit of Linear Momentum
kg•m/s
Forces that particle of a system exert to one another
Internal Forces
Forces that is exerted to any part of the system by other objects outside the system
External Forces
The system is considered to be ________ if there are no external forces acting on it
Isolated
It is the basis of the Third Law of Motion
Conservation of Linear Momentum
According to the Conservation of Linear Momentum, for an isolated system, the total momentum is _________
Conserved
The action of driving or pushing forward
Propulsion
The upward force that the exhaust gases exert on the rocket
Thrust Force
Negative ratio of the relative velocity of the two colliding bodies after collision to the relative velocity before the collision
Coefficient of Restitution
An interaction between two or more bodies that come in contact with each other
Collision
In collision, ________________ is always conserved
Linear Momentum
Type of collision where e=0
Perfectly Inelastic Collision
Type of collision where e=1
Elastic Collision
Type of collision where e is between 0 and 1
Inelastic Collision
Used to determine the velocity of a bullet
Ballistic Pendulum
Resistance to motion whenever two materials or media in contact tend to move
Friction
Types of Friction
Sliding Friction
Rolling Friction
Types of Sliding Friction
Static Friction
Kinetic Friction
Friction is sufficient to prevent relative motion between the surfaces
Static Friction
Present when there is relative motion between the surfaces in contact
Kinetic Friction
Occurs when one surface rotates without sliding nor slipping
Rolling Friction
The maximum angle of slope keeping an object at rest
Angle of Repose
The angle of slope in which the object is in constant velocity
Angle of Uniform Slip
His idea was that motion is classified into two types which are Natural and Violent Friction
Aristotle
Every object has a proper place determined by its nature
Natural Motion
Pushing or pulling forces
Violent Motion
His idea was that the natural tendency of an object is to continue moving and no force is needed to keep it moving
Galileo
Ability to resist any changes in motion
Inertia
Said that moving object needs a steady force to keep it moving
Aristotle
States that every object continues in the state of rest or uniform speed unless acted on by a non zero force
Law of Inertia (1st Law)
The measure of inertia
Mass
States that the acceleration of an object is directly proportional to the net force and inversely proportional to the mass
Law of Acceleration (2nd Law)
This force cannot be reduced into other basic interactions
Fundamental Force
A force that attracts two objects with mass
Gravitational Force
Magnitude of the gravitational force exerted on the object and varies with location
Weight
An attractive or repulsive force between charged bodies
Electromagnetic Force
Force responsible for radioactive decay of some nuclei
Weak Nuclear Force
Force that holds the constituents of the nucleus together
Strong Nuclear Force
A force exerted to an object
Applied Force
A pulling force exerted by a rope, chain, string, or cable
Tension
Perpendicular force
Normal Force
SI unit for force
N (Newton)
States that for every action, there is an equal and opposite reaction
Law of Interaction (3rd Law)
Occurs when a force acts upon an object to cause a displacement of the object
Work
SI Unit of Work
Joule (J)
Ability to do work
Energy
Energy that is possessed by an object due to its motion or position
Mechanical Energy
Energy possessed by an object due to its position or configuration
Potential Energy
Energy due to its position
Gravitational Potential Energy
Energy possessed by its body because of its motion
Kinetic Energy
States that energy can neither be created nor destroyed. It can only change form
Conservation of Mechanical Energy
Ratio of output work to the input work done by a device and it is expressed in percentage
Efficiency
Amount of useful energy provided bu the device to the energy required to operate it
Efficiency
Rate of doing work
Power
SI Unit of Power
Watt (W)
1hp is equal to how many watts?
746 watts
