vocabulary
A push or pull that acts on an object
Force
a wheel with a groove in the rim
pulley
Bryan and Alyssa are exerting a combined force of 10 N. Daniel and Maria are exerting 12 N of force.is this an balanced force?
no
the sum of all the forces acting on an object is called ____________.
net force
an object at rest tends to stay at rest. an object in motion tends to stay in motion in a straight line at a constant speed until another force acts on the object
Newtons 1st Law
the distance an object travels per unit of time
Speed
consists of a rigid bar that rests on a pivot point
lever
max and tim are both playing tug a war. they both pull at the same force. is this balenced force?
yes
when there's an _____ there's an opposite reaction
action
How fast an object picks up speed (accelerates) or slows down (decelerates) depends on the amount of force used and on its mass
Newtons Second law
A change in velocity
Acceleration
a large-diameter wheel rotates in a circle around a small-diameter axle
wheels and axle
two dogs play with the same toy. the end up both pulling on the toy. the first dog is pulling with an force of 11n and the second dog is pulling with an force of 8n is it an unbalanced force?
yes
when there's an action there's an _____
opposite reaction
for every action there is an equal and opposite reaction
Newtons Third Law
devices with few moving parts that make work easier to do
simple machines
an inclined plane that is used as a tool for cutting or separating things
wedges
when you sit on a chair what is pushing up
the chair
Newton's second law of motion states that a force, acting on an object, _________________________.
will change its velocity by changing either its speed or its direction or both.
Inertia is in which law
newtion's first law
The speed and direction of a moving object
Velocity
an inclined plane wrapped in a spiral around a cylinder or cone
screws
when you sit on a chair what pushes down
you
______ is used to analyze motion but dynastics explains what cases motion and changes motion
kinetics
mass is in wich law
Newton's second law