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3 years ago

If the velocity of a moving object doubles, then what else doubles?

Physics

1 answer:

belka [17]3 years ago

8 0

Answer:

The momentum doubles along w/ the velocity, because p=mv.

So, the energy quadruples, because E=(mv^2)/2.

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PLZ HELP MEEEEEEEEE ASAP

mafiozo [28]

The answer is “Impulse acting on it” according to the impulse-momentum theorem.

6 0

3 years ago

Es muy común que cuando se viaja hacia un río o lago se juegue "ranita", el cual consiste en lanzar una piedra horizontalmente h

shutvik [7]

Answer:

a) La piedra es lanzada desde una altura de 0,785 metros.

b) La piedra es lanzada con una velocidad inicial de 6,25 metros por segundo.

Explanation:

a) Dado que la piedra es lanzada horizontalmente, tenemos que la piedra experimenta un movimiento horizontal a velocidad constante y uno vertical uniformemente acelerado debido a la gravedad. La altura de la que fue lanzada la piedra se puede determinar mediante la siguiente ecuación cinemática:

$y = y_{o}+v_{o,y}\cdot t +\frac{1}{2}\cdot g\cdot t^{2}$ (1)

Donde:

$y$ - Altura final, medida en metros.

$y_{o}$ - Altura inicial, medida en metros.

$v_{o,y}$ - Componente vertical de la velocidad inicial, medida en metros por segundo.

$t$ - Tiempo, medido en segundos.

$g$ - Aceleración gravitacional, medida en metros por segundo cuadrado.

Si sabemos que $y = 0\,m$ , $v_{o,y} = 0\,\frac{m}{s}$ , $t = 0,4\,s$ y $g = -9,807\,\frac{m}{s^{2}}$ , entonces la altura inicial de la piedra es:

$y_{o} = y-v_{o,y}\cdot t -\frac{1}{2}\cdot g\cdot t^{2}$

$y_{o} = 0\,m-\left(0\,\frac{m}{s} \right)\cdot (0,4\,s)-\frac{1}{2}\cdot \left(-9,807\,\frac{m}{s^{2}} \right) \cdot (0,4\,s)^{2}$

$y_{o} = 0,785\,m$

La piedra es lanzada desde una altura de 0,785 metros.

b) Ahora, obtenemos el componente horizontal de la velocidad inicial a partir de la siguiente ecuación cinemática:

$v_{o,x} = \frac{x-x_{o}}{t}$ (2)

Donde:

$x_{o}$ , $x$ - Posiciones horizontales iniciales y finales, medidas en metros.

$t$ - Tiempo, medido en segundos.

Si tenemos que $x_{o} = 0\,m$ , $x = 2,5\,m$ y $t = 0,4\,s$ , entonces el componente horizontal de la velocidad inicial es:

$v_{o,x} = \frac{2,5\,m-0\,m}{0,4\,s}$

$v_{o,x} = 6,25\,\frac{m}{s}$

La piedra es lanzada con una velocidad inicial de 6,25 metros por segundo.

4 0

3 years ago

Physics quiz 11 th-12th grade helpp

FinnZ [79.3K]

5. The jogger's velocity is a constant 3.55 m/s between t = 4 s and t = 8 s.

6. Given a linear plot of velocity, the acceleration is determined by the slope of the line. Take any two points on the part of the plot after t = 8 s - for instance, we see it passes through (8 s, 3.5 m/s) and (10 s, 4 m/s) - and compute the slope:

(4 m/s - 3.5 m/s)/(10 s - 8 s) = (0.5 m/s)/(2 s) = 0.25 m/s^2

7. This amounts to finding the area between the velocity function and the time axis and between t = 4 s and t = 8 s. During this time, the velocity is 3.5 m/s. The time interval lasts 4 s. So the distance covered is

(3.5 m/s)*(4 s) = 14 m

8. After 4 seconds, Jimmy's speed decreases from 30.0 m/s to 27.2 m/s, so his acceleration (assuming it was constant) was

a = (27.2 m/s - 30.0 m/s)/(4 s) = -0.200 m/s^2

It's unclear what is meant by "rate of acceleration", since the acceleration is itself a rate. But maybe they just mean to ask for the acceleration, or possibly the magnitude?

4 0

4 years ago

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On a grid, what is the distance between two points located at (1, 1) and (8, 4) roughly equal to?

Diano4ka-milaya [45]

Ithink the answer is a

5 0

4 years ago

What is Nature? How does it explain the human condition?

just olya [345]

Nature is an amazing world around us is mostly life in general. Is all has to do with humans it’s a part of nature. For the human condition is the key of life it’s how we as humans exists in the world like birth, how we grow, emotions, and even conflict.

I hope this help :)

3 0

3 years ago

Read 2 more answers