An aero plane is flying in horizontal direction with velocity 60 km/hr at a height of 1960 m. When it is vertically
above point A on the ground a body is dripped from it. The body strikes the ground at point B. Calculate
distance AB.

1.25 km

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2.50 km

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3.33 km

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4.25 km

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Solution

The correct option is C 3.33 km
$u = \frac{50}{3} m s^{- 1}, A B = u \sqrt{\frac{2 h}{g}} = \frac{50}{3} \sqrt{\frac{2 \times 1960}{9.8}} = 3.33 k m$

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An aero plane is flying in horizontal direction with velocity 60 km/hr at a height of 1960 m. When it is vertically above point A on the ground a body is dripped from it. The body strikes the ground at point B. Calculate distance AB.

The correct option is C 3.33 kmu=503ms−1,AB=u√2hg=503√2×19609.8=3.33 km

An aero plane is flying in horizontal direction with velocity 60 km/hr at a height of 1960 m. When it is vertically
above point A on the ground a body is dripped from it. The body strikes the ground at point B. Calculate
distance AB.

The correct option is C 3.33 km
$u = \frac{50}{3} m s^{- 1}, A B = u \sqrt{\frac{2 h}{g}} = \frac{50}{3} \sqrt{\frac{2 \times 1960}{9.8}} = 3.33 k m$