Use the work energy theorem to solve each of these problems and neglect air resistance in all cases. a) a branch falls from the top of a 98.0 m tall redwood tree, starting from rest. how fast is it moving when it reaches the ground? b) a volcano ejects a boulder directly upward 545 m into the air. how fast was the boulder moving just as it left the volcano?

a)43.8 m/s

b)103.54 m/s

Explanation:

Work energy theorem

Δ Δ

a) In this part v1=0 and h2=0

=0

b) in this part v2=0, h1= 0, and h2= 545m

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.