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IB Physics - Unit 4 Worked Examples I

Oscillation and Waves

· IB,Cell respiration,Physics,IB Physics,Oscillation

Example 1

How does a displacement time graph show that its oscillations are not damped in IB physics curriculum?

Answer

The amplitude remains constant

Example 2

Calculate the magnitude of the maximum acceleration when the time period is 0.2s and the maximum displacement is 0.02m.

Answer

Use the equation a=-ω^2 * xo

ω=2π/t

a=(2π/0.2)^2 * 0.02=19.7m/s

Example 3

Calculate the speed of the oscillation when the time taken is 0.12s to displace by 1.62cm and maximum displacement is 0.02m.

Answer

Use the equation v = (2π/t)√(xo^2-x^2) Answer

v = (2π/t)√(xo^2-x^2)

v = (2π/0.12)√((0.02)^2-(0.0162^2)

v = 31.4√((0.02)^2-(0.0162^2) = 0.37m/s

Example 4

Following the question above, if the diplacement was in a negative direction would be the direction of its motion.

Answer

Even though it would seem logical that the motion would also be in the negative direction it is actually positive. This is because if it were displaced by -0.0162 m, -0.0162^2 is actually a positive number, therefore making the velocity positive. As velocity is a vector quantity, if it is positive it shows that the direction of motion is to the right in IB physics.

End of this part! Please read next part as well!

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Drafted by Gina

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