Any help would be appreciated. I am guessing 3I0 is not equal to -0.75mA. So I have done something wrong.

I can’t see any viable series/parallel combinations and idk how else to do this. It reminded me a bit of those Wheatstone bridge things, but they look far simpler than this.

I've only found T_3 to be 325N

How do I find the x and y components of the ball's velocity at t = 0, 2, and 3.

What about the gravity value and the launch angle?

I tried to calculate the small signal gain of this circuit, but the results are different and I have no idea why. Where did I messed up?

Hi, for some context I'm in an accelerated learning program and unfortunately have only had the opportunity to have been in class a handful of times.

So far I've been able to understand E.T. fairly well, (in my own opinion, I'm sure this is very simple to some) but I'm really struggling with how to break down this circuit and fill out the table with the information given.

I'd be so grateful if someone were able to explain the steps I should take to fill this in. I've got a lot of it done separately but here I present the information given on the worksheet, not my answers.

This problem is purely for practice, and holds no grade value. I think my main issue right now is figuring out the exact flow of current through the circuit, and where exactly the series/parallel parts are in this particular circuit.

Any help is appreciated, seriously!

How do I find the x and y components of the ball's velocity at t = 0, 2, and 3.

What about the gravity value and the launch angle?

1. A 0.10 kg hockey puck is at rest. It encounters a force of 20N for 0.2 seconds that sets it into motion. over the next 2.0 seconds, it encounters 0.4N of resistance force. Finally, it encounters a final force of 24N for 0.05 seconds in the direction of motion. What is the final velocity of the hockey puck?
2. A 0.40 kg object is moving on a frictionless surface with a speed of 30 m/s. A force of 2.0 N is applied continually until the velocity of the object has been reversed. How long was the force applied?
3. A 95.0 kg fullback moving south with a speed of 5.0 m/s has a perfectly inelastic collision with a 90.0 kg opponent running north at 3.0 m/s

a. Calculate the velocity of the players just after the tackle.

b. Calculate the decrease in total kinetic energy as a result of the collision.

Right so what I have done so far is calculated that the speed of the wave is going to be 2m/s by v = fλ. On some research online of this question I've been able to see you're meant to do 2/sin30 to get the speed of the contact points but I have no idea why this works. For instance if I resolve that diagonal vector into it's vertical component and horizontal component, being 2cos30 and 2sin30 respectively, neither of those are the answer. I also don't really conceptually understand this question or where I derive 2/sin30 from to get 4m/s. So I would appreciate it if someone could help me understand where you get 2/sin30 from. Have put this into GPT many times but it's literally no clearer. A diagram of some kind would also be particularly helpful if possible helps me visualise it rather than just some text

I don’t quite understand number 35 (attached is the original question and the answer post by my teacher). I get that you should use conservation of energy first to find the velocity but after that I am lost. I just need someone to explain what else is going on in this question and why. Thank you guys.

So I'm revising and one of the questions in textbook asks to arrange the graphs from the biggest postive value of energy change to the smallest.

The answer is 3,1,2 and there is a clue to use the equation Change in potential energy is the negative interval of the function with variable in time

To understand this I created functions for each graph and then integrated each one from my working it's clear graph 2 will have the lowest value but I don't quite get why 3 has a bigger postive value then 1.

Incase my handwriting is unclear change in energy for each graph is as follows

1: -bx_1 + 0.5ax_1 2: -0.5x_1 3: bx_1 - 0.5ax_1

Determine the voltage between point A and B

hey yall. got a physics 3 exam coming this afternoon, so i was checking previous exams and i have a question about the currents’ path in this specific exercise.

the question itself is about the current flowing in the ammeter A, considering R1 = 3R, R2 = R3 = R and R4 = R/2. thing is. i completely understand all the calculations and logic behind my teacher’s resolution, but the way he chose to represent the currents paths.

why does i1 = i2 - i3 (i1 + i3 = i2) and not i1 = i2 + i3? how did he came up with that? and all the others currents’ direction?

the attached pictures are the circuit of the exercise and the teacher’s resolution. also i’m brazilian, to explain the grammatical errors in this post and the pictures’ language. thank you so much for any help!

Did I do this correctly ? I'm a bit unsure about the current in the 24 ohms resistor because it's in series with the 7 ohms resistor but when adding the current in all four I got 2.03 A which isn't possible if I made the current through both 7 and 24 2.03 A

Pretty much the image. My final equation is missing a cos term. If somebody could clear that for me.

Can someone explain why the answer is B? And how to find the answer to questions like this? Thank you.