Give the magnitude and direction of the net force acting on a stone of mass 0.1 kg just after it dropped from the window of a train running at constant velocity of 36 km/ h.
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Answers
Answer:
(a)1 N; vertically downward
Mass of the stone, m = 0.1 kg
Acceleration of the stone, a = g = 10 m/s2
As per Newton’s second law of motion, the net force acting on the stone,
F = ma = mg
= 0.1 × 10 = 1 N
Acceleration due to gravity always acts in the downward direction.
(b)1 N; vertically downward
The train is moving with a constant velocity. Hence, its acceleration is zero in the direction of its motion, i.e., in the horizontal direction. Hence, no force is acting on the stone in the horizontal direction.
The net force acting on the stone is because of acceleration due to gravity and it always acts vertically downward. The magnitude of this force is 1 N.
Answer:
net force is mg and can be say gravitational force is working in vertically downward direction with 1N magnitude. g is considered 10m/s^2
Explanation:
when mass is dropped from the train then it will have 36km/h velocity .if it is considered that no air resistance is present then only gravitational force is working due to mg witch always apply in vertically downward direction of any mass.
so
F=0.1×10
=1N