Question

A vertical spring (ignore its mass), whose spring stiffness constant is 950 N m^-1

is attached to a table. The spring is compressed down 15 cm and a 300 g ball

placed on it. The spring is then released and the ball flied off vertically. Determine the maximum height reached by the ball.

Answer 1

$kx^2/2=mgh\to$

$h=kx^2/(2mg)=950\cdot0.15^2/(2\cdot0.3\cdot9.8)=3.64\ (m)$