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A force \( F=50 \mathrm{~N} \) is applied at one end of a string, the other end of which is tied to a block of mass \( 10 \mathrm{~kg} \). The block is free to
\( \mathrm{P} \) move on a frictionless horizontal surface. Take initial instant as \( \theta=30^{\circ} \) and final instant as \( \theta=37^{\circ} \). For the time between these
W two instants, answer the following questions?
Net work done by the force \( F \) on the block is
(1) \( \frac{50}{3} \mathrm{~J} \)
(2) \( \frac{100}{3} \mathrm{~J} \)
(3) \( 75 \mathrm{~J} \)
(4) None of these
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