Force
How do you get an object to move?
Apply Force
What is the rule for magnets?
Opposites Attract
Like Repel
What component has the potential energy to run a circuit?
A battery
What is the saying about energy?
It cannot be created or destroyed, only transferred.
What navigation tool reacts to magnetic fields?
A compass
To get an object to stop moving what do you need to?
Apply force in the opposite direction.
If you put one magnet on top of a desk and one under it, how can you move the one on the top of the desk?
The magnetic field is strong enough to go through certain objects.
What is an electromagnet?
A piece of iron that becomes a temporary magnet when electricity flows through coils of insulated wires that are wrapped around it.
Give an example of a non-renewable energy source.
Fossil Fuels
Natural Gas
Coal
What type of magnet is a bar magnet?
Permanent magnet.
Student A is pushing right with a force of 235N. Student B is pulling right with a force of 426N. What is the total force, what direction is the object moving, why is it moving in that direction?
The object is moving right with a force of 661N because both forces are being applied to the right.
S-N N-S N-S S-N
repel
attract
repel
What four things make an electromagnet stronger?
Bigger batteries
More coils
Tighter coils
Thicker wires
Give Three renewable energy sources.
Solar
Wind
Hydroelectric
Geothermal
What is a controlled experiment.
Only testing one variable in an experiment.
A dog-sled driver prepared for her race. Her sled was loaded with equipment, but on snow and ice, the dogs moved the heavy sled. Each dog pulled with a force of 600 N. During the race, she came to an area of grass and dirt instead of snow. The sled slowed to a stop. The driver said, There must be something wrong with one of the dogs. One of them is pulling with a force of less than 600 N. How would you respond to the dog-sled driver?
The force of friction on the grass and dirt is much higher than the snow and ice. So, it is not that the dog is not pulling 600N, it is now that they all need to be pulling more than that.
What is the relationship between distance and force of attraction?
As distance increases the force of attraction decreases.
A group of students stripped the wire of all of the insulation. Their circuit did not work. Why?
You need to have insulated wire so the energy can travel through the wires.
A motor turns what energy into what energy?
Electrical to kinetic
Who invented the electromagnet?
Hans Christian Orsted.
Mr. Meakim pushes with 8,000 N of force on a cart against a wall. The cart doesn’t move. How do you explain the forces at work and why the cart doesn’t move?
The wall is pushing back with 8,000N of force.
How come if you have a permanent magnet you can pick up a screw, and then that screw can pick up a paperclip?
The permanent magnet induces magnetism into the screw. This turns it into a temporary magnet. The temporary magnet can then pick up other iron materials.
Explain how to get a lightbulb circuit to work?
You need to have a battery with wires attached to the positive and negative ends. This way the energy can flow all the way through. Then one wire needs to touch the base of the lightbulb, and the other wire has to touch the metal.
A generator turns what energy into what energy?
Kinetic into electrical
What are the three elements that are magnetic?
Iron, Nickel, Cobalt