Newton's Laws Flashcards
Normal force
Define ‘N’ as the force or a component of a force which a surface exerts on an object with which it is in contact, which is parallel to the surface
Static frictional force
The force that opposes the tendency of motion of a STATIONARY object, relative to a surface
Static kinetic force
The force that opposes the motion of a moving object relative to a surface
Newton’s 1st law
An object remains in its state of rest or motion of constant velocity unless acted upon by an unbalanced force
Newton’s 2nd law
When net force is applied to an object, the object accelerates in the direction of the net force. Acceleration is directly proportional to net force and inversely proportional to the mass of the object
Newton’s 3rd law
When object A exerts a force on object B, object B simultaneously exerts a force equal in magnitude but opposite in direction on object A
Law of universal gravitation
Every body in the universe attracts every other body with a force proportional to the product of their masses and inversely proportional to the square of the distances between them
Newton’s law of motion in relation to momentun
The net force applied to an object is equal to the rate of change of momentum in the direction of the net force
The law of conservation of momentum
The total linear momentum in an isolated system remains constant
Isolated system
A system where the external net force is equal to zero
Momentum
Linear momentum is equal to the product of an objects mass and velocity
Impulse
The net force exerted on an object and the time it takes
Weightlessness
The sensation experienced when all contact forces are lost
Contact forces
Forces theat occur when 2 objects are physically in contact
Non contact forces
Forces that occur even though the objects are not touching
Free body diagram
A diagram that shows the relative magnitudes and directions of forces acting on a body that has been isolated from its surroundings
Mass
The amount of matter in a body( measured in kg )
Weight
The gravitational force exerted on an object( N)
Impulse momentum theorem
Fnet∆t=m∆v=m(vf-vi)
Inertia
The resistance of a body to change its state of rest or motion at constant velocity
Principle of conservation of momentum
The TOTAL linear momentum in an isolated system remains constant
Elastic collision
A collision during which the kinetic energy is conserved
Inelastic collision
A collision during which kinetic energy is not conserved
1D motion
Motion in a straight line
