Caleb wants to find out which type of floor material is best for bouncing tennis balls the highest. which statement best describes the process he should use?

he should use technological design because he will need to make materials.
he should use scientific investigation because he will need to do an experiment.
he should use technological design because he will need to conduct background research.
he should use scientific investigation because he will need to design a prototype.

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?