Recent content by juana_sm

Yes, it looks fine) about the units of k: kg/sec^2=(kg*m)/(m*sec^2)=N/m (N=kg*m/sec^2)

harmonic oscillations are described with this equation: y=y0*sin(omega*t+phi0). In this case, omega=sqrt(k/m), on the other side, omega = 3.85 rad/s. So you can find k. as the energy of the system is constant: k*(y0)^2=m(vmax)^2. From this equation you can find the maximum velocity.

Kinetic energy of the ball is equal to potential energy of the spring, so: mv^2/2=kx^2. You don't need potential energy of the ball here.

I think it's not the best idea to solve this task using energy and work. Maybe it would be easier to use the 1-st Newton's law (for solving the b) task): the friction forse is: mu*(Mg-k*x*sin(theta)), and it is equal to k*x*cos(theta)