Answer:
Puesto que la energia cinética traslacional es mucho mayor que la capacidad del chaleco antibalas, la bala atravesaría el chaleco antibalas.
Explanation:
Un chaleco antibalas soporta el disparo de una bala disipando la energía de esta última a través de su propio material. Si sabemos que el chaleco antibalas soporta 120 joules de energía, cabe saber si la energía cinética traslacional es igual o inferior a ese límite, significando que la bala no atravesaría el chaleco.
La energía cinética traslacional de la bala (), in joules, queda expresada con la siguiente fórmula:
(1)
Donde:
- Masa de la bala, en kilogramos.
- Rapidez de la bala, en metros por segundo.
Si sabemos que y , entonces la energía cinética traslacional de la bala es:
Puesto que la energia cinética traslacional es mucho mayor que la capacidad del chaleco antibalas, la bala atravesaría el chaleco antibalas.
I believe it would be potential energy.
<span>The answers are the second and fourth choices. Although the majority of Americans during that time, including the President of the United States (McKinley), wanted to avoid war and hoped to settle the Cuban question by peaceful means, a series of events early in 1898 strengthened U.S. feelings against Spain. The first was the publication by Hearst of a stolen letter (the de Lôme letter) that was written by the Spanish minister at Washington, wherein the diplomat expressed contempt for McKinley. This was followed by the sinking of the U.S. battleship Maine in Havana harbor on Feb. 15, 1898, with a loss of 260 men. Although Spanish involvement was not proved, U.S. public opinion was aroused and war sentiment rose. The call of the advocates of war was further strengthened as a result of eyewitness reports by members of the U.S. Congress on the effect of the reconcentrado policy in Cuba.</span><span>
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Answer:
Explanation:
Given that,
An object starts from rest at the origin (x₀ = 0) and travels in a straight line with a constant acceleration (a = constant).
The relation between the position (x) and time (t) is given by :
Let v is the velocity of the object.
Let a is the acceleration of the object. It is given by :
So, the acceleration of the object is . Hence, this is the required solution.
Answer:
220.7
Explanation:
distance traveled is 1.5*5=7.5m
PE gain is MGH=3*9.81*7.5=220.7