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Non-contact forces
Question | Answer |
---|---|
Which type of forces can act on objects from a distance? | non-contact |
Name 3 types of non-contact forces. | gravitational, magnetic, electrical |
Gravity is impact by.... | mass and distance |
Which measurement describes how much stuff is in an object? | mass |
Which measurement describes how much gravity is pulling on an object? | weight |
What happens to your weight if you change planets? | It goes up or down based on the mass and gravity of the planet you are on. |
Gravity ______________ with mass. | increases |
Gravity ______________ with distance. | decreases |
++ and -- (like) charges will _____________ each other | repel |
opposite charges _______________ each other | attract |
What two things impact electric force? | amount of charge and distance |
How do we draw electric fields? | Using vector arrows |
Negative charges have arrows that point towards the | middle |
Positive charges have arrows that point towards the | outside |
Force vector arrows represent | strength and direction of the force |
What is the name of a mineral that is naturally magnetic? | magnetite |
Permanent magnets are often made of | iron, nickel , or cobalt |
As time passes, what happens to permanent magnets? | They can loose their strength |
Temporary magnets are only magnetic when? | When they are within a strong magnetic field. |
What is an electromagnet? | An iron core surrounded by a coil of wire that has electricity running through it. |
Two magnets will repel when | like poles are together |
Two magnets will attract each other when | opposite poles are together |
A _________________ is the area around a magnet where the magnetic force works. | magnetic field |
A magnetic field is strongest at the ____________ of a magnet. | ends |