Motion
What is Newton's 1st law of motion?
An object at rest stays at rest, and an object in motion stays in motion at a constant speed in a straight line unless acted on by an unbalanced, external force.
What is a force?
a push or pull acted upon an object
The force that attracts a body toward the center of the Earth, or towards any physical body with mass.
Gravity
What unit do we measure in?
Newtons
How do magnetic poles interact?
opposites attract while same poles repel
How do you find net force?
Adding forces in the same direction and subtracting opposing forces
This force works against motion when two surfaces rub together
friction
In relation to which measurements or judgements can be made
Frame of reference
If 5N is acting on an object to the right, with 23N left, what's the net force?
18N left
a device that converts mechanical energy (kinetic energy) into electrical energy, typically using electromagnetic induction
Generator
What is Newton's 2nd law of motion?
The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
(F=ma)
A push or a pull that does not change an object's motion is called this.
a material that strongly resists the flow of electric current or heat because its atoms have tightly bound electrons that do not move freely.
Insulator
What is the net force if there is 3N of gravity, 5N left and right, and 3N up
0N
What is an electromagnet?
a type of magnet that produces a magnetic field only when an electric current flows through it
What is Newton's 3rd law of motion?
For every action, there is an equal and opposite reaction.
the rate of change of an object's position with respect to a frame of reference and time
Velocity
a force that acts upon a body in a circular path
Centripetal force
A box is pulled left with 15N and right with 10N, what is the net force?
5N right
What is ferromagnetic material?
iron, nickel, and cobalt
What 4 forces can act upon an object?
Normal force, applied force, gravity, friction
What is drag?
The force that acts on an object falling through the air, opposite to gravity
an electromechanical device that converts electrical energy into linear mechanical motion using a coil of wire (electromagnet) and a movable ferromagnetic plunger
Solenoid
A 15kg sled is pulled with 50N of force, but friction opposes it with 20N. What is the net force?
30N
How do you make a electromagnet stronger?
increase the current (voltage) passing through the coil, add more turns of wire