Answer:
Explanation:
1 ) The superball which bounces back with the same velocity will be more effective at closing the door . It creates greater impulse on the door because it creates more change in momentum .
2 ) The final momentum of the clay ball will be zero because its velocity after collision will be zero.
3 ) The area of force - time graph gives the value of impulse.
4 ) When the collision is made on a perfect spring , it becomes perfectly elastic . In this case the velocity of recoil is same as that before the collision . So there is no loss of energy in the collision.
5 ) The change in momentum will give the value of impulse. Since we can calculate the velocity before and after the collision , we can calculate the value of impulse. If m be the mass and v be the value of velocity before the collision
impulse = change in momentum
= m v - ( - mv )
= 2m v.
Answer:
e. 27 rho.
Explanation:
The density of an object, assumed constant, is defined as the relationship between the mass and the volume.
If the object is compressed in such a way that the diameter is reduced to 1/3, this means, that the radius will be reduced in the same proportion.
Now, if the mass remains the same (the compression can't change it) , the volume (assumed to be a perfect sphere) will be reduced also:
V₀ = 4/3*π*r³
Vf= 4/3*π*(r/3)³ = 4/3*π*(r³/27) = V₀/27
As the volume is in in the denominator of the expression for density, this means that the new density will be equal to 27 times the original one:
ρ₀ = m/ V₀
ρ₁ = m/ V₁ = m/ (V₀/27) = 27* (m/V₀) = 27*ρ₀
False
Stars become larger and sooon KABBOOOM its yeeted away
Its like newtons 3rd law that once in motion a outer force has to stop it