Which of the following is not a projectile: (a) a bullet fired from a rifle (b) a bomb dropped from an aeroplane (c) a cricket ball moving in space (d) hydrogen balloon floating in air
Answers
Answer:
d
Explanation:
as a hydrogen balloon can have random motion
Answer:
A floating hydrogen balloon isn't a projectile. D is hence the correct answer.
Explanation:
A projectile is any object that, once launched or dropped, maintains velocity due to its own inertia and is solely impacted by gravity's downward pull. The force of gravity operates on a projectile
However, because hydrogen is less dense than air, it floats in the air, therefore the air pushes the balloon up to more than gravity pulls it down, and the balloon attempts to rise!
The buoyant force operating on the hydrogen-filled balloon outweighs its weight. As a result, it floats.
The force that is exerted on the balloon is The buoyant force on a submerged item equal to the weight of the fluid displaced by the object, according to the Archimedes Principle.