Aball player hits a home run, and the baseball just clears a wall 21.0 m high located 130.0 m from home plate. the ball is hit at an angle of 35.0° to the horizontal, and air resistance is negligible. assume the ball is hit at a height of 1.0 m above the ground. a. what is the initial speed of the ball? b. how much time does it take for the ball to reach the wall? c. find the components of the velocity and the speed of the ball when it reaches the wall

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.