An aeroplane flying horizontally with a velocity of 216 km h -1 drops a food packet while flying at a height of 490 m. The total horizontal distance travelled by the packet is

Question

An aeroplane flying horizontally with a velocity of 216 km h -1 drops a food packet while flying at a height of 490 m. The total horizontal distance travelled by the packet is (A) 600 m (B) 490 m (C) 216 m (D) 490 × 216 m

Tardigrade Admin · Accepted Answer

Time of fall, t=√(2 h/g)=√(2 × 490/9.8)=10 s Horizontal speed =216 × (5/18)=12 × 5 ms -1=60 ms -1 Horizontal distance =60 ms -1 × 10 s =600 m

Q. An aeroplane flying horizontally with a velocity of $216 km h^{- 1}$ drops a food packet while flying at a height of $490 m$ . The total horizontal distance travelled by the packet is

$600 m$

$490 m$

$216 m$

$490 \times 216 m$

Time of fall, $t = \frac{2 h}{g} = \frac{2 \times 490}{9.8} = 10 s$
Horizontal speed $= 216 \times \frac{5}{18} = 12 \times 5 m s^{- 1} = 60 m s^{- 1}$
Horizontal distance $= 60 m s^{- 1} \times 10 s = 600 m$

Q. An aeroplane flying horizontally with a velocity of 216kmh−1 drops a food packet while flying at a height of 490m. The total horizontal distance travelled by the packet is

600m

490m

216m

490×216m