A ball player wishes to determine pitching speed by throwing a ball horizontally from an elevation 1.8 m above ground level. The ball lands 18 m downrange. The player's pitching speed is ( g=10 m/s2 )

Question 4 options:

10 m/s

30 m/s

1 m/s

0.95 m/s

10.8 m/s

18 m/s

35 m/s

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.