1.
QUESTION Does doubling the initial displacement double the speed of the object at the
equilibriumm point? Explain O Yes, the maximum speed is directly proportional to the initial
displacement. O No, it multiplies the speed at the equilibrium point by v2 O No, it multiplies the
speed at the equilibrium point by 4. O No, the speed at the equilibrium point is unaffected.
PRACTICE IT Use the worked example above to help you solve this problem. A 0.490 kg object
connected to a light spring with a spring constant of 21.0 N/m oscillates on a frictionless
horizontal surface. (a) Calculate the total energy of the system and the maximum speed of the
object if the amplitude of the motion is 3.00 cm m/s (b) What is the velocity of the object when
the displacement is 2.00 cm? (c) Compute the kinetic and potential energies of the system when
the displacement is 2.00 cm. EXERCISE HINTS: GETTING STARTED I'M STUCK! For what
values of x is the speed of the object 0.11 m/s? cm
Solution
here,
let the initial displacement be A and maximum speed be v
total energy = 0.5 * m * v^2 = 0.5 * K * x^2
v = sqrt(K/m) * A
so, the maximum velocity is directly proportional to the initial displacement
Doubling the initial displacement double the speed of the object at equilibrium point