Did you pay attention in the engineering dynamics class?

[admin]

A toy consists of a plastic frog on a spring attached to a base.  The frog also has a rubber sucker underneath, concentric with the spring.  The frog is stuck to the base using the rubber sucker, compressing the spring.  Eventually the spring overcomes the suction of the rubber sucker and the frog jumps in the air.  If the frog weighs 10gm, and the spring requires a force of 0.1 newton per mm of compression and is compressed by 25mm, what is the maximum speed reached by the frog?

[Heinz R.]

If my arithmetic is right the max speed will be about 7.75 m/sec. (I approximated g at 10m/sec (sq).