Answer:
(b) Yes, the earth gains momentum but the change in momentum of the earth is much lesser compared to that of everyone in the air. The resistance to motion (inertia of the earth), which is a function of its mass is so great that the earth's acceleration is small in the given time frame.
Explanation:
From Newton's second law which can be stated mathematically as
F = m(v-u)/t = ma.
By Newton's law of gravitation, there is a force between the earth and everyone in the air. This force is responsible for the change in momentum of everyone in the air and this force gives them an acceleration equal to g = 9.80m/s². By Newton's law of gravitation and Newton's third law of motion, this force is also equal to the force exerted by everyone on the earth.
For this to be true,
F = M (everyone) ×a (everyone) = M(earth) × a (earth).
And
a (earth) = {M (everyone) ×a (everyone) }/M (earth)
Then
a (earth) must be lesser than a (everyone) since M(earth) >> M(everyone).
a = change in momentum/ time
Therefore the earth will have a much lesser change in momentum which is the reason we won't notice the earth's movement.
Thank you for reading.
Answer:
Please find the answer in the explanation
Explanation:
Given that a light bulb will glow when electrons flow through it. As the electron flow increases, the brightness increases as well. A student hooks up two circuits containing three light bulbs in each circuit. In one circuit the lights are connected in series and in the other circuit the lights are hooked up in parallel.
If you could only see the lights in the circuit and the wires were covered up, how could you tell the type of circuit?
The type of the circuit can be determined if you loose or unscrew one light bulb, all other bulbs will be switched of if connected in series. But if the others remain on it is a parallel circuit.
because of conduction the metal spoon is a conductor so the heat is getting traveled through the spoon and into your hand
Answer:
Option (d)
The angular momentum of the system is 5 Kg-m²/s
Explanation:
Angular momentum: Angular momentum is the product of angular velocity and of moment of inertia.
Angular momentum is dented by L
And the unit of angular momentum is Kg-m²/s
L= I×ω
I is momentum of inertia
ω is angular velocity.
The unit of angular velocity is red/s.
Momentum of inertia : Momentum of inertia is the sum square the perpendicular distance from the rotational axis to of product mass of each particle of the body.
The S.I unit of momentum of inertia is kg-m²
The angular momentum of a system is:
L= ∑I ω
=∑ Mr²ω [ Since ]
Given , M= 1 kg, r₁=1 m , r₂= 2 m and ω = 1 rad/s.
The angular momentum of the system is
L= Mr₁²ω+Mr₂²ω
= Mω(r₁²+r₂²)
= {1×1 (1²+2²)}
=5 Kg-m²/s
Answer:
Breaks because it doesn't have force in the radial direction and thus due to inertia the stones will fly off tangentially.
Explanation:
Until the stone is tied to a string, it will possess centripetal force and centrifugal force along the radial direction of motion due to the tension present in the string. Now, when the rope breaks, it breaks because it doesn't have force in the radial direction and thus due to inertia the stones will fly off tangentially.
