Flashcards in Ch. 12 vocab Deck (29):
What is a push or pull that acts over an object?
What is an SI unit that measures a force?
What is the overall force acting on an object after all the forces are combined?
What is a force that opposes the motion of objects that touch as they move past each other ?
What is the friction force that acts on objects that are not moving?
What is a force that opposes the direction of motion of an object as it slides over a surface?
What is a change in shape at the point of rolling contact?
What is a force that opposes the motion of an object through a fluid?
What is it called when fluid friction acts on an object moving through the air?
What is a force that acts between any two masses?
What is the constant velocity of a falling object when the force of air resistance equals the force of gravity?
What is the motion of a falling object after it is given an initial forward velocity?
Who was an ancient Greek scientist and philosopher who incorrectly proposed that a force is required to keep an object moving at a constant?
Who was an Italian scientist who concluded that moving objects not subjected to friction or an other force would continue to move indefinitely?
Who was the first person to define mass and mass and force?
How can a force accelerate a moving object?
by changing its speed and direction
A newton causes a 1km mass to accelerate to what?
If forces are moving in the same direction, you ______ the forces.
If forces are moving in the opposite direction, you _________ the forces.
If the net force is ____, then there is no motion.
When an unbalanced force acts on an object, there is _________.
All moving objects are subject to ________.
List the order of the four frictions in order from weakest to strongest.
A _______ force balances out a downwards force of gravity.
_________ causes objects to accelerate downwards, whereas ___ __________ acts in the direction opposite to the motion and reduces acceleration.
State Newtons 1st law of motion.
An object at rest tends to stay at rest, while an object in motion tends to stay in motion unless acted upon by an unbalanced force
What is Newton's first law of motion also known as?
law of inertia
State Newton's second law of motion.
Acceleration is directly proportional to the size of the force
Acceleration is inversely proportional to mass