Newtons 1st Law
Define Newtons 1st Law
the tendency of an object in motion to stay in motion and an object at rest to stay at rest
Define newtons 2nd law
The amount of acceleration of a body is proportional to the acting force and inversely proportional to the mass of the body
Define Newtons 3rd law
What are the metric units for Mass
kg
What is the formula for newtons 2nd law?
F=ma
unbalanced
according to newtons 2nd law the relationship between force and acceleration are
directly proportional
according to newtons 3rd law the if I push on a table...
the table pushes back on me
What are the units used for velocity
m/s
What is the symbol used to represent the coefficient of friction?
mu
Define Inertia
the tendency of an object in motion to stay in motion and an object at rest to stay at rest
according to newtons 2nd law acceleration and mass have a _________________ relationship
inverse
What term is used to describe how difficult an object is to stop
momentum
What are the units for momentum
Kg*m/s
What is the symbol to represent change in?
Delta
True or False
Mass can be defined as the amount of inertia on object contains
true
What force is needed to give a mass of 675 kg an acceleration of 2.25 m/s/s? MUST INCLUDE UNITS
675x2.25= 1518.75 Newtons
Impulse can be defined as
change in momentum
What are the units of Weight?
Newtons
What is the symbol for momentum?
P
What is the mass of a 98 Newton crate? Include units
98/9.8= 10 kg
What is the acceleration of a 20 kg mass when a 50 N force is applied to it? MUST INCLUDE UNITS
50/20 a = 2.5 m/s/s
An 100 kg boulder is accelerated from 1 m/s to 12 m/s in 10 seconds what is the force acting on the boulder? Must include units
force = change in momentum over time
(100-1200=1100 change in momentum)
1100/10s= 110 Newtons
What do we call units that are created by combining base units?
Derived units example m/s
scaler is quantity alone (mass, speed, time)
vector has magnitude and direction (velocity, force)