Question

An aeroplane flying 490 m above ground level at 100 m/s, releases a block. How far on ground will it strike

• A. 0.1 km
• B. 1 km
• C. 2 km
• D. None

Answer 1

Answer: (B)

1 km

Answer 2

$S = u \times \sqrt{\frac{2h}{g}} = 100 \times \sqrt{\frac{2 \times 490}{9.8}} = 1000m = 1km$