Question

A spring stretches 6.0 cm when a 0.30 kg block is hung from it. If a 0.60 kg block replaces the 0.30 kg block, how far does the spring stretch?

Answer 1

12 cm

Step-by-step explanation:

Hooke's Law is

F = -kx,

In other words

Force applied to spring = spring constant * length the spring is stretched

Since the length the spring stretches (x) is *directly proportional* to the applied force (in this case, F is the force due to gravity).

When the weight of the block doubles (0.3kg->0.6kg), the stretch doubles as well (6cm -> 12 cm).