Forces Flashcards
What is the name given to the single force that is
equivalent to all the other forces acting on a given
object?
The resultant force
State Newton’s first law for a stationary object.
If the resultant force on a stationary
the object is zero, the object will remain at
rest
State Newton’s first law for a moving object
If the resultant force on a moving object
is zero, the object will remain at constant
velocity (same speed in same direction).
State the defining equation for Newton’s
Second Law.
Resultant force = Mass x Acceleration
F = ma
State Newton’s Second Law in words.
An object’s acceleration is directly
proportional to the resultant force acting
on it and inversely proportional to its
mass.
What is weight?
The force that acts on an object due to
gravity and the object’s mass.
What quantities does weight depend on?
Weight = mass x gravitational field strength
● The object’s mass
● The gravitational field strength at the
given position in the field
What is the unit used for weight?
The Newton (N).
What is the unit used for gravitational
field strength?
N/kg
What piece of equipment can be used to measure an
object’s weight?
A calibrated spring-balance or newton meter.
