ohe foinaph for the motion of mass hangng from a spring to a following questions
ID: 306629 • Letter: O
Question
ohe foinaph for the motion of mass hangng from a spring to a following questions: 1.0 0.5 0 Time (see) 5. What are the period, frequency, and amplitude? 6. If the positive direction is upward, choose "A". "B". "C, and/or "D" for the following: The velocity is maximum and positive. The velocity is maximum and negative,-- The velocity is zero. The acceleration is maximum and positive. The acceleration is maximum and negative. _ The acceleration is zero. The net force is maximum and positive. The net force is maximum and negative. The net force is zero._ 7. Recall that kinetic energy is KE-1/2mv'and elastic potential energy of a spring is PE -1/2kr2. At what position(s) is the kinetic energy zero? when the kinetic energy is zero, is the elastic potential zero or a maximum? Explain what is going on in terms of conservation of energy. 12-9 IC & ASTRONOMYExplanation / Answer
5. T = 20/4 = 5 sec ....Ans
f = 1/T = 1/5 = 0.20 Hz ....Ans
A = 1 m
6. v= v_max and +ve => D
v = V_max and -ve = B
v = 0 : A, C
a_max and +ve : C
a_max and -ve : A
a = 0 : B , D
F = m a
F is max and +ve : C
F is max and -ve : A
F = 0 : B, D
7. KE will zero where v = 0
points: A, C ......Ans
KE + PE = total energy
when KE = 0 ( Ke can not be negative so zero is minimum value)
hence PE will me maximum ......Ans
when KE is zero then all its energy is stored as elastic potential energy .
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