Vocab
What is the force of gravity on Earth?
9.8 m/sec2 or 9.8 N
Where does the Earth's gravity pull?
To the center of the Earth
If you say,"A bird is going 30 m/hr west." you are stating its _______.
Velocity (Speed+direction= velocity)
An object in motion will stay in motion unless acted on by a ________.
force
This force resists motion when to objects interact
friction
The amount of matter that makes up an object is called ________
mass
What is the measurement of the force of gravity on an object or Mass x Gravity = ?
Weight
Speed =
Distance over time (ex. miles per hour or centimeters per year)
A rocket taking off is an example of which of Newton's laws?
Newton's 3rd Law
______ is a property of matter. This is the tendency of matter to resist a change in it's state of motion.
Inertia
What is the definition of friction? Be close to the answer for credit.
a force that resists motion when two objects interact.
What is the force that acts between any two masses and pulls them together? Anything that has mass has ________
Gravitational force
What is the equation for acceleration?
See board
Newton's second law states that force = ______________ x ____________
mass times acceleration
A____ is a push or pull that affects an object's motion
force
This is moving mechanical energy
kinetic energy
Removing air friction, which will hit the ground first between a hammer and a feather?
They will hit at the same time
A car rolls to complete stop at a stop sign. This is an example of _________
acceleration
When you push off your friend ice skating, you push your yourself back with equal force. This describes which law?
3rd
______is a force that does cancels one another out causing no change in acceleration
balanced forces
According to the 2nd Law of Thermodynamics: Energy cannot be _______ or _______. give an example for bonus points
created or destroyed
Gravity makes objects the natural shape of ______
spheres
Mr. Maher had a starting speed of 2 m/sec then he saw free comic give away. He was now traveling 10 m/sec. This took 5 secs. What was his acceleration?
2m/sec2
The more mass an object has, the more _____ is needed to move the object. (Which law is this this)
force (Newton's 2nd Law)
Give an example of unbalanced forces at work.
answers will vary