Question
When an 80.0-kg man stands on a pogo stick, the spring is compressed 0.120 m. (a) What is the force constant of the spring? (b) Will the spring be compressed more when he hops down the road?
1. $6540 \textrm{ N/m}$
2. Yes. When he lands on the spring, the compression of $0.120 \textrm{ m}$ is when his acceleration downwards is zero. Further compression is needed to accelerate him upwards to change the direction of his velocity.
Solution Video