Newton's 1st Law
Minimum and maximum force by combining: 45N and 20N
Maximum: 65N
Minimum: 25N
Two people are pushing a door. One person is pushing with a total force of 40N, the other one 30N. What is the Net Force on the door?
10N
Action: The Earth pulls the moon.
What is the reaction?
Moon pulls the Earth.
d is what in a formula?
distance
Velocity
Another name for First Law of Motion
Law of Inertia
Three people exert a total force of 675N on a boulder in the same direction. One person pushed with a force of 275N. The other two pushed with the same amount of net force. What are their net force each?
200N
The windshield hit the bug, then the bug splattered against the window. Which action exerted more force? The windshield, the bug hitting the window, both are equal, or it's impossible to calculate?
Both are equal
a is what in a formula?
acceleration
Defined as the motion of an object where gravity is the only force acting upon it
Free fall
True or false: an astronaut's tool will float and stay in one place in space.
True
There is no interfering force (no gravity in space)
Force equals ____ times acceleration
mass
"For every action, there is an _____ and _____ reaction."
equal
opposite
g is what in a formula?
acceleration due to gravity
The resistance of the object to any change in its motion, including a change in direction
inertia
An object at rest stays at rest and an object in motion stays in motion with the _____________ unless acted upon by an unbalanced force.
same speed and in the same direction
Your 1000kg car's engine can put out a force of 5000N. How many seconds will it take for your car to go from 0 to 30 m/s? (Hint: you will use two formulas)
If you are an astronaut slowly drifting away from the space station, you might be able to drift back to the station by throwing a 7kg tool in the direction you are traveling. True or false.
True
Name one of the three free fall formulas
v = gt
d = 1/2g t^2
g = 9.8 m/s^2
Full name of the inventor of law of motions
Isaac Newton
Who discovered inertia?
Galileo Galilee
When getting on the highway, your car goes from 25 to 100 mph in 5 seconds. What is your car's acceleration (mi/h s)?
15 mi/h s
When you hold an apple above your head, how many force pairs act on the apple?
2
The triangular-shaped symbol in a formula means what?
"change in" - how much it increased or decreased
The combination of all forces acting on an object
Net force