Answer:
Momentum is define as the product of the mass and velocity of a body. It is measured in Kgm/s.
Explanation:
Momentum is the product of mass and velocity of an object. When an object or a body of mass 'm' is moving with velocity 'v', then its momentum can be determined as;
momentum (P) = mass × velocity
i.e P = m × v
= mv
It is measured in Kgm/s.
The change in momentum of a body is referred to as its impulse (Ft).
ΔP = m(v - u) = Ft
Where: P is the momentum of the object, m is its mass, v is its final velocity, u is the initial velocity, F is the force and t is the time in which the force acts.
Answer:
wavelength, frequency, energy and speed
Explanation:
Answer:
The incidence rate is typically expressed as the number of cases per person-year of observation. Only new cases are considered when computing the incidence rate, while cases that were diagnosed earlier are excluded. The “population at risk” measure is usually obtained from census data.
Explanation:
The incidence rate is typically expressed as the number of cases per person-year of observation. Only new cases are considered when computing the incidence rate, while cases that were diagnosed earlier are excluded. The “population at risk” measure is usually obtained from census data.
The moment of inertia is ![24.8 kg m^2](https://tex.z-dn.net/?f=24.8%20kg%20m%5E2)
Explanation:
The total moment of inertia of the system is the sum of the moment of inertia of the rod + the moment of inertia of the two balls.
The moment of inertia of the rod about its centre is given by
![I_r = \frac{1}{12}ML^2](https://tex.z-dn.net/?f=I_r%20%3D%20%5Cfrac%7B1%7D%7B12%7DML%5E2)
where
M = 24 kg is the mass of the rod
L = 0.96 m is the length of the rod
Substituting,
![I_r = \frac{1}{12}(24)(0.96)^2=1.84 kg m^2](https://tex.z-dn.net/?f=I_r%20%3D%20%5Cfrac%7B1%7D%7B12%7D%2824%29%280.96%29%5E2%3D1.84%20kg%20m%5E2)
The moment of inertia of one ball is given by
![I_b = mr^2](https://tex.z-dn.net/?f=I_b%20%3D%20mr%5E2)
where
m = 50 kg is the mass of the ball
is the distance of each ball from the axis of rotation
So we have
![I_b = (50)(0.48)^2=11.5 kg m^2](https://tex.z-dn.net/?f=I_b%20%3D%20%2850%29%280.48%29%5E2%3D11.5%20kg%20m%5E2)
Therefore, the total moment of inertia of the system is
![I=I_r + 2I_b = 1.84+ 2(11.5)=24.8 kg m^2](https://tex.z-dn.net/?f=I%3DI_r%20%2B%202I_b%20%3D%201.84%2B%202%2811.5%29%3D24.8%20kg%20m%5E2)
Learn more about inertia:
brainly.com/question/2286502
brainly.com/question/691705
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Explanation:
From Newton's second law:
F = ma
Given that m = 4 kg and a = 8 m/s²:
F = (4 kg) (8 m/s²)
F = 32 N
If m is reduced to 1 kg and F stays at 32 N:
32 N = (1 kg) a
a = 32 m/s²
So the acceleration increases by a factor of 4.