Science Chapter 3 Test
Terms in this set (21)
Newton's seccond law
a law that states a net force acting on an object causes the object to accelerate in the direction of the net force.
the force between two surfaces that are touching (always opposite motions)
What are the three types of friction?
sliding, static, and rolling friction
the force that opposes initial movement due to rough surfaces called microwelds
continued forming and breaking of microweds of two surfaces sliding past eachother
friction between a rolling object and the surface it's rolling on.
What does friction always do?
the force of gravity pulling an object
a force that pulls something to the center of it
the tendancy of an object to resist any changes in its motion
A frictional force the air exerts on a moving object. It slows down an object as it moves through the air.
The constant speed that a free falling object eventually reaches when the resistance of the medium through which its falling prevents further acceleration.
Newton's first law?
An object in motion/rest stays in motion/rest unless acted on by another force
Newton's third law
When an object exerts a force on a second object, the second object exerts an equal but opposite force on the first object.
Conservation of Momentum
Momentum can't be created nor destroyed, but can be transferred to other objects.
anything that'e being flown or shot in the air. It takes the path of an arch.
What is force and how is it expressed?