Recent content by lamp23

If u stand on top of a spaceship, u will not be thrust backward? U only do on top of an airplane because of air resistance? So if u jump up out of a horizontally moving spaceship, after you jump out you are moving with the same horizontal speed as you were inside the spaceship? U just have to...

In the situation where a horse pulls a wagon, how is it possible for the horse to accelerate if the wagon is exerting an equal and opposite force? Wouldn't the forces cancel each other out?

Then you are assuming that f(x)=ax+b is the equation of the line. Yet in the derivations for an equation of a line that I have seen (one in Stewart's Calculus), that equation is derived from assuming a =Δy/Δx is constant.

Before I just accepted that the slope of a line is constant, but I'm wondering if there is an even more fundamental definition of a line. If one draws two right triangles with a certain Δx and Δy as the legs and wants to prove that the connection of the two hypotenuses is a straight line...

Hmm, I guess my main problem is I'm thinking of wind as a very lightweight object and comparing it to the plane or the boat as a much heavier object, but I guess I'm not supposed to be thinking of the wind as an object since there is a steady stream of it. It's easier for me to think about the...

I wish they would state what they meant by the wind having such a speed. Otherwise I just think of a boat that is only traveling a few mph against a wind with a greater speed yet the boat still making progress, because I think of the wind not being nearly as massive as the boat and not creating...

In plane-wind problems where you are given the velocity of the boat and the velocity of the wind, my textbook gave the solution as just adding the vectors. How do we know we can just add the vectors? Even though the wind might be blowing faster than my boat, won't my boat still make progress...