Which statement BEST describes how muscles respond to weight training? A.
Weight training stretches the muscles' limits and makes the muscles longer.
B.
Weight training pushes the muscles' abilities, making the muscles gain endurance.
C.
Weight training stimulates the muscles and causes the muscle fibers to sit closer together.
D.
Weight training overloads muscles, which causes the body to respond by making muscle fibers larger.

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

What can you increase the strength of an electromagnet by

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?