As we know that spring force is given as

here we know that
F = 4 N
x = 2 cm = 0.02 m
now from the above equation we will have


so the elastic constant of the spring will be 200 N/m
Explanation:
Given the conditions A,B and C when the pendulum is released, at point A the initial velocity of the pendulum is zero(0), the potential energy stored is maximum(P.E= max),
the conditions can be summarized bellow
point A
initial velocity= 0
final velocity=0
P.E= Max
K.E= 0
point B
initial velocity= maximum
final velocity=maximum
P.E=K.E
point C
initial velocity= min
final velocity=min
P.E= 0
K.E= max
Answer:
The equation of current is 
Explanation:
Resistance, R = 12 ohm
Inductance, L = 0.06 H
E (t) = 12 cos (120 t)
Compare with the standard equation,


So, the inductive reactance is
XL = w L = 120 x 0.06 = 7.2 ohm
The impedance of the circuit is

The current leads by 90degree so the equation of current is

Answer:
kinda
Explanation:
can i have brainlyest pls?
Answer:
Name one organ or organ system in the human body that relies upon voltage to function properly.
BRAIN
Explanation:
The brain works with the passage of signals in form of neurons to all part of the body. The brain interprets every signals sent from all part of the body and respond by passage of signals in neuron form to deliver to the recipient part of the body