A bob is suspended from a crane by a cable of length l = 10 m . The crane and load are moving at a constant speed v 0 . The crane is stopped by a bumper and the bob swings out an angle of 6 0 ∘ . Fi

Question

A bob is suspended from a crane by a cable of length $l = 10 m$ . The crane and load are moving at a constant speed $v_{0}$ . The crane is stopped by a bumper and the bob swings out an angle of $6 0^{\circ}$ . Find the initial speed $v_{0}$ . (Take $g = 10 m / s^{2}$ )

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Answer:

A

Solution:

$h = l (1 - cos 6 0^{\circ}) = 5 m,$
so $v_{0} = 2 g h$
$= 2 \times 10 \times 5$
$= 10 m / s$ .

TestHub · Accepted Answer

h ​ = l ( 1 − cos 6 0 ∘ ) = 5 m , ​ so v 0 ​ = 2 g h ​ = 2 × 10 × 5 ​ = 10 m / s .

Physics - Circular Motion Question with Solution | TestHub

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