Recent content by AvrGang

ok now I can solve the question using this but i still don't know from where did you bring (1-cos\theta)

try it i think my answer may be correct

I used trigonemotry to find it as you say

right or wrong? please tell me I'll be very thankful

ok is this the answer of a) K.E.(f) + P.E.(f) = K.E.(i) + P.E.(i) (1/2 m(V)^2 + mgh)(f) = (1/2 m(V)^2 + mgh)(i) 1/2 m(V(f))^2 = mgh(i) 1/2 m(V(f))^2 = mg(5sin30) (V(f))^2 = 2g2.5 V = 7m/s

can we use the string's length?

I did that: my reference is the lowest point of the trajectory K.E.(f) + P.E.(f) = K.E.(i) + P.E.(i) (1/2 m(V)^2 + mgh)(f) = (1/2 m(V)^2 + mgh)(i) 1/2 m(V(f))^2 = mgh(i) how can i find initial hieght h(i)

ok but what is the initial height How can i calculate the height

I'm online for any discussion

Homework Statement I had just finished solving 9 energy problems and I'm stuck with this hard question: A simple pendulum, which consisits of an object suspended by a string. The object is assumed to be a particle. The string, with its top end fixed, has negligible mass and does not...

Homework Statement A 5.0-m-diameter merry-go-round is initially turning with a 4.0 s period. It slows down and stops in 20 s. a. Before slowing, what is the speed of a child on the rim? b. How many revoluotions does the merry-go-round make as it stops? ( Can i know what is a merry-go-round)...

i found it using the graph in my book I'll try to post the graph

ok here is my attempt: I found the height from where the ball is caught(1.0m above the ground) to the highest point of the roof where the ball clear the roof. The height is 3 m but Ididn't find an equation to find the velocity.

I'm online for any discussion

Homework Statement Here is a question that I spent 1 hour trying to find a solution but I din't come up with any solution, so please give me any hint you know to solve this problem. The question is: You're 6.0 m from one wall of a house. You want to toss a ball to your friend who is 6.0...