A. 16N
B. 20N
C. 32N
D. 40N

Correct Answer: Option C

C. 32N

Explanation

X = 50 sin30 = 30 x 0.5 = 25cm

40 x 20 = p x 25

p = (40×20)/25

= 32N

SEE ALSO  The diagram below illustrates an electromagnetic wave travelling with speed of 3.0 x 10^8 ms‾¹. Calculate the wavelength of the wave.

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