A
The vector representing the change in an object's position is __.
displacement
Term that is assigned to a single vector showing the combined effect of two or more vectors.
Term that is assigned to the rate of doing work.
resultant
power
When a car slows down, it experiences a negative acceleration called __.
deceleration
Which law states that the velocity of an object does not change unless the object is acted upon by an external force?
first law of motion
Which law states that any two objects attract each other with a force that depends on their masses and the distance between them?
law of universal gravitation
Which law states that for every action there is an equal and opposite reaction?
third law of motion
What is known as the quantity of motion of an object?
(it is equal to the product of the object's mass and velocity)
momentum
Any change is speed or direction is considered ____.
acceleration
What is the type of friction that affects moving objects?
kinetic friction
Which law is often called the law of inertia?
first law of motion
What is the SI unit of power?
What is the SI unit of force?
watt
newton
States the relationship between the hypothenuse and legs of a right triangle...
Pythagorean Theorem
Which law states that the force applied to an object is directly proportional to its acceleration?
second law of motion
What is defined as distance traveled in a given time?
speed
What type of quantity is velocity? (scalar or vector)
vector quantity
Which term refers to the gravitational force exerted on an object near the surface of the earth?
gravity
Who published the laws of motion and universal gravitation and in which book?
Sir Isaac Newton in Principia
Which force cause an object to travel in a curved path rather than in straight line?
centripetal force
Name the resistance arising to an object's motion across a surface.
friction
How do you call two vectors that are either in the same direction or in opposite directions?
collinear
Physical quantities having magnitude but not direction are __.
scalar quantities
Which three things affect the force of friction?
nature of the surface
weight of the object
coefficient of friction
Physical quantities having both magnitude and direction are ___.
vector quantities
Which is the branch of physics that deals with the effects of forces on matter?
mechanics
The velocity at which the force of air resistance on a falling object equals the object's weight is __.
terminal velocity