Plz i need this is due in 45 mins ty

Figure 1

Speed is a scalar quantity, It has only magnitude but no direction. It is defined as rate of change of distance.

Mathematically,    speed = distance÷time

                                     S = d ÷ t

                                      S = 2560 ÷ 60

                                      S =  42.67 m/s.

Bits:

Speed is a scalar quantity, that describes only the magnitude (42.67 m/s) of the rate of change of an objects distance. Determine the objects speed requires a unit of distance per unit of time

Figure 2

Velocity is a vector quantity, It has both magnitude and direction. It is defined as rate of change of displacement.

Mathematically, Velocity = Displacement ÷  time

                                     V =  75 ÷ 1.5

                                     V = 50 Km/h.

Velocity is a Vector quantity that describes both the magnitude and direction  of the rate of change of objects displacement plus it describes its position. An objects overall change in position is known as  its Displacement  per unit time.

the part of the wave he is travelling on is the crest

the bal will not change its velocity.