Energy has many different forms: energy is the energy of motion, for every moving object and living thing; energy is a stored energy, ready to be used and converted into other types of energies.

Kinetic and potential energy are both proportional to the of the object under study. If you take a -kg ball and place at the top of an inclined plane, at 4 m from the ground, it will have a energy of 392 J. While it slips down the plane, its energy increases, its energy decreases, and its energy remains constant. If we neglect other factors such as friction, we can assume that the ball, once arrived at the bottom of the plane, it will have a velocity of m/s.

The choices for the blanks are: 0, 10, 86, 392, directly, height, inversely, kinetic, mass, potential, total and velocity.

Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.

Which changes of state do the labels represent? a: b: c:

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.