force Flashcards
a push or pull of one object on another object, measured in Newtons (N)
force
a push or pull of one object on another object, measured in Newtons (N)
Spring constant x extension
Acceleration
Changing speed of an object
Velocity/time = acceleration
External force
Push or pull acting on an object
Gravity
the force Fg about 10.0 m/s2
(Fgrav) is the mass of an object multiplied by a grav.
It is NOT just the acceleration of gravity
At rest
Not moving
In motion
Moving
Newton’s first law
Objects do not change their movement without a force acting on them
Newton’s Second Law : F=ma
Newton (N) = kg • m/s2
F = m x a
force = mass x acceleration.
Constant
Not changing
Velocity
Metres per second
Distance / time
Constant acceleration
Vsquared x usquared = 2as
If there is no change in the velocity, we use this equation
Weight
Weight = mass / 10 or 9.8
Pull
To move something towards
Push
Move something away
Magnitude
Size of something
Vector
Magnitude with a direction
Air resistance
Force caused by air
Unbalanced forces
Object is moving, total net force >0
Balanced forces
Object is moving, total net force = 0
free body diagram
drawing that shows the forces acting on an object
Mass
the amount of matter or stuff of an object (measure in kg)
Terminal velocity
the constant speed that a freely falling object reaches when the resistance (of the way which it is falling) stops further acceleration.
Contact force
Objects are touching
Non contact force
Objects are not touching
