The videos below introduce the basics of forces. The focus is on vocab and short-answer type questions, and also introducing some forces and formulas that you'll need for the rest of the forces exam.
Common Forces You Should Know
This video briefly explains and gives you the basic formulas for a bunch of forces you'll be seeing a ton in the forces section of physics: Tension, Springs (Hooke's Law), Weight (gravity), Normal Force, and Friction. The most useful of those is probably normal force, since that's the one with the least helpful name.
Mass vs Weight
This quick video explains the difference between mass and weight, and gives you a couple of examples that will come in handy if you're answering a short answer question about it!
Net Force & Equilibrium
This video explains what "net force" is, at least for physics (not sure about fishing). Bad news: it's a vector sum, so you'll have to use X & Y components! But you've been to that rodeo before, like in projectile problems, so should be plug and chug at this point. Also defined: equilibrium, and how a car can be at equilibrium while going 50 mph down the highway.
Contact Forces vs Field Forces
This video quickly explains the difference between contact forces and field forces, and gives you a few examples of each.
Units of Force (Newtons)
These days, Newtons are the only unit of force that any physics profs seem to use. But that's actually good for you, because even though they're funky when you first see them, by the end of this video you'll see that as long as you always use kg and m/s2 in all your calculations, Newtons are easy!
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