Question

An aeroplane flying horizontally with a speed of 360km/h releases a bomb at a height of 490m from the ground. If g=9.8m/s^2, it will strike the ground at ___________

(a) 10km

(b) 100km

(c) 1km

(d) 16km

This question was addressed to me by my college director while I was bunking the class.

This is a very interesting question from Motion in a Plane in portion Laws of Motion of Engineering Physics I

Answer 1

Right option is (c) 1km

Explanation: Time is taken by the bomb to fall through a height of 490m,

t = √(2h/g) = √((2×490)/9.8)=10s

Distance at which the bomb strikes the ground = Horizontal velocity × time = 1km.