Recent content by JiJiasd

Now I tried 0,5*m*(sin(30)*v)^2 - mu * m*g*cos(30) *h/sin(30) = m*g*h but not working

I tried with 0,5*m*(sin(30)*v)^2 - mu * m*g*cos(30) = m*g*h but it does not give me the correct answer thanks

What equation you did use ? thanks

Homework Statement Homework Equations m*v^2 / 2 and k*x^2 / 2 and 0,5*m*v^2 The Attempt at a Solution [/B] in task a I got correct answer there v = 20 m/s in task b I got wrong answer I got the distance = 0,76 m but I should be 32 m here is my answer : 0,5*m*(sin(30)*v) - mu * m*g*cos(30)...

thank you all

Homework Statement A boy trample everything he can on his tricycle and manages to briefly hold speed 9 km / h on flat ground. When he stops pedaling cycle continues by itself 7.5m bout it stops due to friction. The boy and the bike weighs together 21 kg. How large average power develops boy...

Homework Statement I want to calculate the height h of the skier in this figure Homework Equations potential energy and kinetic energy and there is no friction The Attempt at a Solution mgh = 0,5 *m*v^2 v=√ (2*g*h) Now calculate the h when he goes up mgh= 0,5 *m*√ (2*g*h)^2Am I doing...