Force and distance is the main criteria for the movement of the object. The work of the object can be defined as the ‘product’ of the force and distance.
Answer:
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Answer:
The speed of the melon as it flies off the man’s head is 0.3 m/s.
Explanation:
Given;
mass of the melon, m₁ = 2 kg
initial speed of the melon, u₁ = 0
mass of arrow, m₂ = 0.05 kg
initial speed of the arrow, u₂ = 30 m/s
final speed of the arrow, v₂ = 18 m/s
let v₁ be the final speed of the melon as it flies off the man's head.
Apply the principle of conservation of linear momentum;
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
2(0) + 0.05 x 30 = 2v₁ + 0.05 x 18
1.5 = 2v₁ + 0.9
2v₁ = 1.5 - 0.9
2v₁ = 0.6
v₁ = 0.6 / 2
v₁ = 0.3 m/s
Therefore, the speed of the melon as it flies off the man’s head is 0.3 m/s.
<span>Submarines are equipped with water tanks called ballast tanks that fill up to submerge the vessel. Emptying the tanks and filling them with air causes the submarine to surface.</span>
Answer:
The distinction can be understood by their individual definitions given below.
Explanation:
A meteoroid is a small rocky/metallic body that can be found in outer space (space beyond the Earth's atmosphere). Their sizes are much smaller than asteroids (often called planetoids) and even more smaller than that of any planets or their moons. They generally originate from comets, asteroids (fragments of them) and even from planets or moons when there occurs heavy collisions.
A meteor is basically what we know to be "shooting stars". When a meteoroid, asteroid, etc. passes through the Earth's atmosphere, they heat up and begin to glow because of the frictional force experienced due to gas molecules in the atmosphere. But the important thing is that they do not reach the surface of the Earth as they completely burn out long before coming close. If some object does manage to reach the Earth's surface, we then call it a meteorite.
(These definitions are not restricted to the Earth but applies to all panets <em>and </em>moons.)
(Also check the gif provided here: https://en.wikipedia.org/wiki/Meteoroid)
