A2 kg ball is released from rest at the top of a track and
reaches a speed of 10 mls at the bottom.
a. how much kinetic energy does the ball have?
b. how much potential energy did it have at the top of
t
hill (assuming no energy was lost?
c. what was the height of the hill?

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)