Which statement is true regarding flexibility?
a. joint's range of motion cannot be maintained with age.
b. a joint's range of motion will be lost if the joint is not used regularly.
c. flexibility decreases with age because muscle strength increases.
d. flexibility decreases at a rate predetermined at birth.

Steelhead trout migrate up stream to spawn.occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b.leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?