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Ludmilka [50]
2 years ago
5

Que es la aceleración , tipos y formula​

Physics
1 answer:
nirvana33 [79]2 years ago
5 0
Fórmula de la aceleración
La mecánica clásica entiende la aceleración como una variación de la velocidad de un cuerpo en el tiempo. Matemáticamente esto se escribe como: a = dv / dt, donde a es aceleración, dv la diferencia de velocidades y dt el tiempo en que ocurre la aceleración.
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A 30-g bullet is fired with a horizontal velocity of 450 m/s and becomes embedded in block B, which has a mass of 3 kg. After th
Zolol [24]

Answer:

(a) The velocity of the bullet and B after the first impact is 4.4554 m/s.

(b) The velocity of the carrier is 0.40872 m/s.

Explanation:

(a) To solve the question, we  apply the principle of conservation of linear momentum as follows.

we note that the distance between B and C is 0.5 m

Then we  have

Sum of initial momentum = Sum of final momentum

0.03 kg × 450 m/s = (0.03 kg + 3 kg) × v₂

Therefore v₂ = (13.5 kg·m/s)÷(3.03 kg) = 4.4554 m/s

The velocity of the bullet and B after the first impact = 4.4554 m/s

(b) The velocity of the carrier is given as follows

Therefore from the conservation of linear momentum we also have

(m₁ + m₂)×v₂  = (m₁ + m₂ + m₃)×v₃

Where:

m₃ = Mass of the carrier = 30 kg

Therefore

(3.03 kg)×(4.4554 m/s) = (3.03 kg+30 kg) × v₃

v₃ = (13.5 kg·m/s)÷ (33.03 kg) = 0.40872 m/s

The velocity of the carrier = 0.40872 m/s.

3 0
3 years ago
Explain why different materials have different thresholds to change states matter
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Answer:

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Explanation:

3 0
3 years ago
A 2.6 mm -diameter sphere is charged to -4.5 nC . An electron fired directly at the sphere from far away comes to within 0.37 mm
motikmotik

Answer: 1.96\times 10^{8}\ m/s

Explanation:

Given

Diameter of sphere is d=2.6\ mm\quad \quad[r=1.3 mm]

Charge on the sphere is Q=-4.5\ nC

Nearest distance electron can reach to sphere is d=0.37\ mm

Here, kinetic energy of electron is converted into electrostatic energy between the two i.e.

\Rightarrow \dfrac{1}{2}mv^2=\dfrac{kQq}{d}\\\\\Rightarrow \dfrac{1}{2}\times 9.1\times 10^{-31}\times v^2=\dfrac{9\times 10^9\times 4.5\times 10^{-9}\times  1.6\times 10^{-19}}{(3.7\times 10^{-4})}\\\\\Rightarrow v^2=3.8491\times 10^{16}\\\Rightarrow v=1.96\times 10^{8}\ m/s

Thus, the initial speed of electron is 1.96\times 10^{8}\ m/s.

7 0
3 years ago
What happens to an object if the forces acting on it are unbalanced?
Ludmilka [50]

A because an unbalanced force is an unopposed force that causes a change in motion. (I got this info from Google)

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