Why is a recovery period between bouts of exercise important?

select one:
a. recovery periods reduce muscle performance.
b. resting between workouts to prevent injuries.
c. recovery periods stimulate metabolism.
d. resting enhances muscle soreness and fatigue.

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

Give an example in which the electrical energy changes to light energy

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?