Force
What is force?
Force is a push or a pull exerted on an object.
Who is Sir Isaac Newton?
Accredited with published knowledge of gravity and mathematical principals (though other cultures, going as far back as ancient Greece and 11th century Arabic scientist studied gravity).
What is a magnet?
Magnets are any material that attracts iron or materials containing iron. Other materials, such as nickel and cobalt can also be magnetic.
What is electric charge and what can cause an object or substance to have an electric charge?
Electric charge is a fundamental property that leads to the electromagnetic interactions among particles that make up matter. Electric charges can be positive or negative and is the result of an imbalance in the amount of positive or negative charges in an object.
Highschool is a time to start fresh and meet new friends. What's one way you can meet new friends in hs?
Join clubs and teams, ask to sit at a new lunch table, be kind and earn aura points with your actions.
Define and give an example of contact and non contact force
Contact force: forces that only act between objects that are touching. Ex: air resistance and friction.
Noncontact Force: Forces that can act at a distance. Ex: magnetism and gravity
What is Newton's First Law of Motion?
States that, unless acted on by an unbalanced force, an object at rest stays at rest and an object in motion stays in motion.
What is a magnetic force?
A magnetic force is a push or pull exerted by the magnet.
What does the sign (+ or - ) of a charge tell you about the electric force?
The sign of the electric charges determines whether the electric force pushes or pulls on objects. When objects have like charges, they repel each other. When objects have opposite charges, they attract each other.
What club, sport, or activity are you excited to try in high school?
Journalism? Yearbook? Art Club? Sports Club? 4-H? Video Game Club? Science? Math? So many more opportunities in high school!!
How are mass and weight related?
Mass is the amount of matter in an object. Weight is a measure of the pull of gravity on that mass. Weight is a force.
What is Newton's Second Law of Motion?
States that the acceleration of an object depends on the mass of the object and the amount of force applied. F = m * acceleration.
How do the poles of a magnet affect the magnet?
Depending on whether the like or opposite poles are facing each other, magnets push or pull on other magnets.
What determines the magnitude of an electric force?
The magnitude of the charge depends on how many extra positive or negative charges build up on the object.
You'll have homework in almost every subject, almost every day in high school. Would you change anything with your study routine to be more successful next year?
Time management, using a planner, and setting small goals will help you manage the work load!
How can you decrease friction between two surfaces that slide past each other?
Smooth the surfaces in some way. You could also change the surfaces that are in contact with one another (for example, you could put WD-40 an a squeaky door hinge and that will decrease friction).
What is Newton's Third Law of Motion?
States that when one object applies a force to a second object, the second object applies an equal and opposite force to the first object.
Why are some materials magnetic and others not?
It depends on if the material has magnetic domains. Magnetic domains are a region composed of a group of atoms whose magnetic fields are aligned in the same direction.
Does the sign of a net charge on an object change the magnitude of the charge? (If it has a + or - sign?)
No, the sign of the net charge on an object does not change the magnitude of the charge. For example, a positive charge of +2 and a negative charge of –2 both have magnitude 2.
I didn't talk to anyone my whole first semester of high school :) Just remember, most students are feeling similar to you. Be brave! Be yourself!
Explain why the gravitational force between two small objects does not usually cause motion.
For there to be noticeable gravitational force that would cause motion, there usually needs to be a significant difference in mass between the objects. For example, rain drops fall to the ground easily because they are not very massive, while the Earth is very massive and provides a strong gravitational pull on the raindrops.
Use the formula for force to find:
The force of a 20 kg cart rolling at an acceleration of .5 m/s2.
force= mass * acceleration
20 kg * .5 m/s2 = 10 N
Draw a model of a magnetic field and explain where the field is the strongest.
The spacing between field lines indicates the strength of the field. The closer the field lines are to one another, the stronger the field is. The field is strongest near each pole of the magnet and decreases as the distance from the pole increases.
Perform the electric slide for 500 points.
Grape vine right, then left. Step back 3 steps, toe tap your right foot, then your right heel, turn right into a grapevine and start all over!
What are you most looking forward to in high school? What do you think you'll miss?
I am looking forward to_______________.
I will miss ____________.