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a_sh-v [17]
3 years ago
14

How much force is needed to accelerate at 66 kg skier 4m/s^2 ?​

Physics
1 answer:
Ray Of Light [21]3 years ago
7 0
E force needed to accelerate a 68 kilogram-skier at a rate of
1.2
m
s
2
is 81.6 Net forces.
Explanation:
Take the mass(68kg) and the acceleration of the skier(
1.2
m
s
2
) and multiply them together
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Nellie pulls on a 10kg wagon with a constant horizontal force of 30N. If there are no other horizontal forces, what is the wagon
s2008m [1.1K]

Answer:

The acceleration of the wagon is 3 m/s².

To calculate the acceleration of the wagon, we use the formula below.

Formula:

F = ma............. Equation 1

Where:

F = horizontal Force

m = mass of the wagon

a = acceleration of the wagon.

make a the subject of the equation

a = F/m.............. Equation 2

From the question,

Given:

F = 30 N

m = 10 kg

Substitute these values into equation 2

a = 30/10

a = 3 m/s²

Hence, the acceleration of the wagon is 3 m/s².

5 0
2 years ago
La temperatura de cambio de estado, ¿Puede ser igual para todos los materiales? Justifica comparando dos materiales
Soloha48 [4]

Answer:

No.

Explanation:

Para darnos cuenta de esto tenemos que pensar en lo siguiente:

Pensemos en un vaso de vidrio, lleno de agua hasta la mitad, la otra mitad puede ser manteca derretida

Si metemos el vaso en la heladera durante un par de horas, (sabemos que la manteca en la heladera se mantiene sólida) veremos que la manteca se solidificó en la parte de arriba, mientras que el agua sigue líquida.

Entonces encontramos dos compuestos con distintas temperaturas para cambio de fase, pero materiales es más específico, y puede referirse a materiales puros.

Entonces vamos a dos metales:

Primero tenemos una pieza de hierro y una de mercurio en el congelador (supongamos que ambas están a 0°C).

Ahora los sacamos del congelador y los dejamos llegar a temperatura ambiente.

Como bien sabemos, el mercurio es líquido a temperatura ambiente, entonces el mercurio va a sufrir un cambio de fase

Ahora pensemos en el hierro; claramente va a seguir siendo sólido a temperatura ambiente, entonces podemos ver dos materiales cuyo cambio de fase de sólido a líquido ocurre en distintas temperaturas, por lo que podemos concluir que no, la temperatura de cambio de estado no puede ser igual para todos los materiales, y esto se debe a que la estructura atómica de todos los materiales es diferente.

8 0
3 years ago
What kind of reaction (endothermic or exothermic)
baherus [9]
Exothermic is the right kind of reaction.
4 0
4 years ago
What happens when your wearing socks and you shuffle across a carpet then touch a door knob?
natali 33 [55]

Answer:

You build up kinetic energy and you get shocked this happens because static has built up from the socks and the rug. This also happens when you rub a balloon on your head or shuffle across a trampoline with socks on.

Explanation:

brainliest plz

8 0
3 years ago
(1 point) Answer the following questions about the sphere whose equation is given by x2+y2+z2−4x+4y=73. x2+y2+z2−4x+4y=73. 1. Fi
pychu [463]

Answer:

R=9.

C=(2,-2,0).

Explanation:

Lets try to find how x^2+y^2+z^2-4x+4y=73 can be written in the form of (x-a)^2+(x-b)^2+(x-c)^2=R^2, since then its radius R and center of coordinates C=(a,b,c) would be easily recognizable.

Since we have the terms -4x and +4y, they seem to have come from the terms (x-2)^2 and (y+2)^2, and we would need to take care of the extra +4 by substracting then. More explicitly:

(x-2)^2-4=x^2-4x+4-4=x^2-4x, as we had originally with the x terms

(y+2)^2-4=y^2+4y+4-4=y^2+4y, as we had originally with the y terms

Which means:

x^2-4x+y^2+4y+z^2=(x-2)^2-4+(y+2)^2-4+z^2

Or, putting all together:

(x-2)^2-4+(y+2)^2-4+z^2=73

(x-2)^2+(y+2)^2+z^2=9^2

So our radius is 9 and the center is (2,-2,0).

5 0
3 years ago
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