Newton's Laws
The First Law of Newton is also known as the law of ______
Inertia
In the______, the object in motion is represented by a series of single points
Particle Model
An object’s ____ specifies both how fast it is moving and in what direction it is moving.
velocity
The name of the force that pulls us towards the center of the earth
gravity
gravitational force
A push or a pull exerted on an object that causes or attempts to cause a change in motion.
A force
The third law of newton states that every force has an equal and _____ force
opposite
A time interval is the difference between two ______.
times
The acceleration of an object with a constant speed is always _____
zero
What is the value of acceleration?
9.8 m/s2
9.81 m/s2
Every force vector possesses both a ____ and a direction.
magnitude
What is the formula associated to the second law of Newton?
F=m*a
The zero point in a coordinate system is called the_______
origin
______ are used to determine an object's position, velocity, and the precise time and location where two objects meet.
Position-time graphs
When an object is at rest, what is its initial velocity?
0 m/s
The specific contact force transmitted through a rope, string, cable, or wire when pulled taut.
tension Force
Calculate the force:
F=? N
m= 35 kg
a= 4 m/s2
F= 140 N
A ____ is a measurement that does not have a direction
scalar
When acceleration and velocity vectors point in opposite directions, the object is _____
slowing down
What is the final velocity of an object that is thrown upwards when it reaches maximum height?
0 m/s
An object is in equilibrium if and only if the net force acting on it is _____
zero
0
Calculate the acceleration
F= 200 N
m= 67 kg
a= ? m/s2
a= 3m/s2
A ______ is a physical quantity that has both magnitude and direction.
vector
When acceleration and velocity vectors point in the same direction, it is______ .
speeding up
A train travels 50 km in 0.6 hours from one station to another, what was its average velocity?
83.34 km/h
The perpendicular contact support force exerted by a surface against an object resting on or pressing against it.
Normal Force