Question

18. If a stone of mass 0.05 kg is thrown out a window of a train moving at a constant speed of
100 km/h then magnitude of the net force acting on the stone is

(a) 0.5 N
(b) zero
(c) 50 N
(d) 5 N ​

Answer 1

Answer:

(a)

Explanation:

Here, the net force on the stone will only be, because the present state of it and will not be affected by history of it's motion.

So, net force acting presently on the stone= mg = 0.05 * 10 N = 0.5 N.

Answer.

Answer 2

Answer:

f = ma

present net force on stone is 10

0.05 x 10= 0.5N