#1 Vocab
What is force?
The strength or force that keeps something moving.
What is momentum?
The first part of the law says that an object at rest ____ _______ at rest unless a force acts upon it.
will remain
Newton's second law of motion deals with ____ and ______.
The third law of motion says that for every force or action, there is an _____ and ______ reaction.
equal and opposite
A force that slows down moving things.
What is friction?
The act of going from one place to another; movement.
What is motion?
The second part of the law states that an object in motion ____ _______ moving in the same way unless a new force changes the motion.
will continue
The 2nd law explains that an object's motion _______ upon its mass and the amount of force needed to move that mass.
depends
As air rushes out of an open balloon, an equal force _____ in the opposite direction.
pushes
The force that pulls things toward the center of Earth or any other object that has mass.
What is gravity?
The energy a body has because of its position; stored energy.
What is potential energy?
What fell and hit Newton's head that led him to discover gravity?
an apple
This law of motion also deals with speed. The _____ an object moves, the more force is needed to stop it.
faster
Greater masses have a stronger pull. If they move farther apart, the pull between them gets ______.
weaker
The tendency of an object to resist change in the direction or speed of its motion.
What is inertia?
The rate of movement.
How many laws does Newton have?
A great deal of force will be needed to ______ the inertia of a train's motion and make it stop.
overcome
Isaac Newton observed that all objects pull on each other due to gravity. His findings became known as the _______ ___ of _______.
Universal Law of Gravity
The energy that a moving body has because of its motion.
What is kinetic energy?
The act of using force to move something over a certain distance.
What is work?
Newton's first law of motion is sometimes called the ___ __ ______.
Velocity
The greater mass of an object, the more the force of Earth's gravity pulls on it, and the more it _____.
weighs