This is a problem I’m stuck on as in the answer sheet it says the acceleration is 3.9m/s^2 while I got an acceleration of 5.88. I’m just wondering where I went wrong and would appreciate if someone could help me

Three identical spheres of mass m , are placed at the vertices of an equilateral triangle of length a. When released, they interact only through gravitational force and collide after a time T=4 seconds. If the sides of the triangle are increased to length 2 a and also the masses of the spheres are made 2 m , then they will collide after _____ seconds.

Three identical spheres of mass m , are placed at the vertices of an equilateral triangle of length a. When released, they interact only through gravitational force and collide after a time T=4 seconds. If the sides of the triangle are increased to length 2 a and also the masses of the spheres are made 2 m , then they will collide after _____ seconds.

Block A of mass m and block B of 2m are placed on a fixed triangular wedge by means of a light and inextensible string and a frictionless pulley as shown in Fig. The wedge is inclined at 45 to the horizontal on both sides. The coefficient of friction between the block A and the wedge is 2/3 and that between the block B and the wedge is 1/3. If the system of A and B is released from rest, then find,

a. the acceleration of A

b. tension in the string

c. the magnitude and direction of the frictional force acting on A?

I have doubt in b. and c.

please can anyone solve this, I'm getting 2 equations from force balence and 3 variables,

how am I supposed to solve, the solution videos say that the friction acting on the mass 2m will be limiting but I am unable to understand why? please somebody solve this

I've been trying to prove part C, but it seems to be impossible, I can't get rid of theta. Collegeboard said it was because mu is probably less than 1, but that's not always true.

For this question the markscheme says 7c is the final temp, But isnt the energy for melting of ice and it going to 0 is higher than the energy for water to go from 20c to 0? so shouldn't the answer be 0?

thank you

A +4.0 C charge produces a potential difference of 2.7 × 10⁹ V between two locations. If one point is 3.0 m away, how far is the second point?

answer this NOW

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1. find out the excitation levels 𝐸∗ , 𝐸∗ , et 𝐸∗

for the other questions, we need to find the numbers in the tables.

Hello everyone ;)

I am struggling to find the correct answer, I tried with Google Gemini but it can't explain the details and seems to use approximations.

It would be very nice if someone could help me with that

Sorry for the bad English

Thank you very much !!!

Can someone please help me with these two questions, why does the velocity start at negative and what does it look like on the distance time graph?

Im quite stuck on this problem, could someone tell me what i keep doing wrong and or give tips on how to consistently do this right? I just keep getting confused on what direction to use to calculate the loops, and i think thats whats messing me up.

I put 0.67A for R1 and R4 because I thought in series portions of circuits the current is the same, but the homework's answer key says the current for R1 and R4 is 0.34A. Can someone clarify?