1. a baseball is thrown straight upward. describe the direction and magnitude of the velocity, force of gravity, and the varying air resistance force as the ball rises. explain whether the net force increases, decreases, or is unaffected by the air resistance force. repeat for the part of the motion when the ball is at maximum height and the part of the motion when the ball is moving downward

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.