Newton's 1st Law
"an object at rest will stay at rest and an object in motion will continue in motion with the same velocity unless acted on by an outside force"
Units of acceleration.
m/s2
The only cause of acceleration when an object is in free fall.
Gravity
True or false: Mass and weight are the same thing.
False
Units of distance
Meters
An action that has the ability to change motion.
a force
Newton's 2nd Law
The amount of acceleration of an object depends on both the net force that is applied to it and its mass
The reason why acceleration due to gravity is considered a negative value.
It is acting in the negative (downward) direction
This remains constant, regardless of its location in the universe.
Mass
Units of time
Seconds
If there is no change in an object's motion, then there is no _____ acting on that object.
net force
As the mass of an object increases, the force needed to accelerate it [ increases / decreases ].
Increases
The difference between the velocities calculated in each equation.
V-average is the average velocity over an entire fall, while the other velocity is at a specific time.
An object's weight depends on these 2 things.
Mass and gravity
Units of mass
Kilograms
The property of an object that resists changes in motion.
inertia
The cause of a change in acceleration.
Net force
The equation used to answer the following problem: A ball is dropped from rest from the highest floor of Saint Hubert's. What is its velocity when it hits the ground 2.74 seconds after being dropped?
velocity equals gravity multiplied by time
v = g*t
Calculate the weight of a 15-kilogram object on Earth.
-147 N
Units of force
Newtons
The reason why it is more difficult to change the motion of a semi-truck than a desk.
The semi-truck has a greater inertia than the desk.
According to Newton's 2nd Law, when the net force increases this also increases.
Acceleration
The average velocity of a free falling object that is dropped from rest and has a final velocity of -33.74 m/s.
-16.87 m/s
Earth's gravity is greater than the moon's gravity. Because of this, will an object have a greater weight on the earth or on the moon?
Earth because it has a greater gravity (and so, its objects will have a greater weight)
Units of weight
Newtons