The figure displays a wave pulse at t = 0 . The pulse travels to the right with a speed of 10 cm s^ -1 . Determine the respective rightward shifts of the shape of the string at t = 1 s , 2 s and 3 s .

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Correct answer: B. 10 cm , 20 cm , and 30 cm

The speed of the wave pulse is given as

v = 10 \text{ cm s}^{-1}

.

The rightward shift of the wave pulse in time

t

is the distance traveled by it, which is given by

d = v \times t

.

At

t = 1 \text{ s}

, the shift is

d_1 = 10 \text{ cm s}^{-1} \times 1 \text{ s} = 10 \text{ cm}

.

At

t = 2 \text{ s}

, the shift is

d_2 = 10 \text{ cm s}^{-1} \times 2 \text{ s} = 20 \text{ cm}

.

At

t = 3 \text{ s}

, the shift is

d_3 = 10 \text{ cm s}^{-1} \times 3 \text{ s} = 30 \text{ cm}

.

Therefore, the respective rightward shifts are

10 \text{ cm}

,

20 \text{ cm}

, and

30 \text{ cm}

.

The figure displays a wave pulse at t = 0 . The pulse travels to...

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