r/HomeworkHelp

3rd grade.
Kiddo went to his teacher to see why his answer was incorrect.

He asked if he could have partial credit for the question, and said that his reasoning was that gravity attracts everything with mass while magnets only attract metal.

She said she wanted him to say “because magnets repel” for question 11. I’m not sure the question is worded specifically enough to warrant that exact answer.

Son is still wondering why his reasoning is wrong.

Thoughts?

I’m having a lot of trouble following along with what to do for my trees here, I don’t want this done for me but if anyone could help me figure out which syntactic categories attached together it would be very helpful. I just really don’t know what to do here!!

Is there a way of interpreting this so that the answer selected is not also correct? The top right is from the class notes the professor posted. I feel like I’m not bad at this but had classmates agreeing that was incorrect. Astro and Opus 5.5 also could not come up with a reason for that answer to be incorrect (I’m not saying this makes me right). Thanks for any help.

Im not sure if my previous work is correct but im currently stuck on question 6 part a. I think Im mostly thrown off with the batteries.

Im studying for my exam and i dont have an answer key for this review. Id appreciate it if someone can check if ive made mistake anywhere. You dont have to check everything if you dont want I just want to be sure im getting this.

Sorry for my messy hand writing

I got this question wrong on a test, but I don't understand why it's wrong/what's the correct answer

I am confused… I first thought 50N since there should be an equal opposite force to balance it out. Then I tried using some math by adding all the forces (technically net torque = 0) and got 75N. What is actually correct?

We started lab on projectile motion the other day. We are to send a marble down a ramp at an incline of 19 degrees, 0.75 m up the ramp where it will slide down into a short horizontal distance (meaning 0 acceleration) and fall off of a table that is 0.92 m tall. (Diagram is attached) The marble has to hit a cart that is going toward the table, so that the cart moving is timed with where the marble will hit. The cart’s velocity is 0.4 m/s towards the table, which we deemed as a negative. Teach gave us the acceleration down the incline, which was gsintheta - 0.8 to account for friction, which he also says is one dimensional and therefore doesn’t need to be split up into components. All of my groups calculations are attached, however we were short by ~0.2m on our first try. Teach said that our acceleration is too big, and that it should be less than 1m/s^2. Obviously it makes sense logically, since there’s no way a marble is moving 2.3 m/s^2 in such a short amount of time, but since the angle is the only input besides changing the direction of g, we have no clue as to how acceleration is supposed to be solved for. The only way I’ve been able to get an acceleration under 1m/s^2 has been by changing my calc into radians, but teach claims that we should stay in degrees. If only Newton was here to help…but like fr help us please we lost