Recent content by physlexic

I see from your examples, it would make sense to use sine then in those situations. thank you for the explanation. I suppose I will confront him about this, as nice as possible.

are you agreeing that I was correct? because if so that's a whole letter grade I get back to my test if I can stump my professor and prove that I was right...and I help out my classmates with the same answer as me. and that's true...because if it was 90 degrees no work would be done but since...

Homework Statement On my exam, I got this problem wrong, which I believed was incredibly easy, and I don't know why it's wrong... "A constant force of 25 N is applied as shown to a block which undergoes a displacement of 7.5 m to the right along a frictionless surface while the force acts. What...

Homework Statement Whenever I solve a free-fall problem and it asks for the time, I never am sure what the time represents once I solve for it. I understand when you throw a ball in the air and it comes back down, the time it takes to ascend up, is the same time it takes to descend down...

But every Average Velocity equation is x2-x1 / t2-t1 at least that's what my book defines it...the change in time is the final time minus the initial time. Same applies for displacement but yet they are adding it here as well.

Homework Statement Problem reads: In reaching her destination, a backpacker walks with an average velocity of 1.34 m/s, due west. This average velocity results because she hikes for 6.44 km with an average velocity of 2.68 m/s, due west, turns around, and hikes with an average velocity of 0.447...

Newton's third law that states for every action, there is an equal and opposite reaction ? Therefore does fk = Fn? I'm sorry if this isn't correct, I struggle a lot with this course...

Homework Statement Problem: A 10 kg box slides down a hill and has a constant velocity. The angle of the hill is 10° with respect to the horizontal. What is the coefficient of kinetic friction between the surface of the hill and the box? Homework Equations Fn = mg + ma ƒk = μk * Fn The Attempt...

Thanks for the replies everyone! So for when it asks for direction it does not want a degree, just left or right? Okay. I attempted this problem again, and for the first part I totally forgot why I assigned my mg as sin and not cosine. If anyone could get me back on track on what I was...

OH SHOOT lol! Sorry! For all my calculations I meant 30 degrees! No idea why I was putting 10 o_O I guess I was mixed up with a previous problem.I always thought the normal force was perpendicular to the x-axis so I made it perpendicular to the F1 force...I always have trouble drawing the normal...

Homework Statement The problem reads: Two forces act on a 5.0 kg block on a friction-less surface. (a) Draw a free-body diagram (b) Determine the magnitude of the normal force (Fn) (c) Determine net horizontal force (d) Determine the magnitude and direction of the horizontal acceleration I...

Okay I think I understand in my own terms, for example, the y-axis is on the adjacent side of where 10 degrees is therefore adjacent means cosine...and opposite to that degree is sine which lies horizontal, therefore the x-axis. Thanks for the explanation, it did take me quite a while to...

I understand my math is rusty, I haven't been in a math course or any course that requires math in over three years, I just went back to school. Can anyone please give me a thorough explanation? I've been googling but I can't seem to find any tutorials or articles to help me determine whether...

Homework Statement Hey everyone, I'm horrible at physics so bear with me if it's a really easy question. I was working a problem out, where I assigned my x-axis with cosine, and my y-axis with sine, like how I always thought it should be. However, in the solution, they assigned sine for the...