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3 years ago

It the same child has a velocity of 2 m/s half-way down the slide, what is his kinetic energy?

Physics

1 answer:

Pani-rosa [81]3 years ago

5 0

Answer:

$\frac{1}{2} \times m \times {v}^{2} \\ \frac{1}{2} \times m \times {2}^{2} \\ 2 \times m$

I dont the child mass...you should substitute that value to (m)

then you can get your answer

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Un automóvil viaja a la velocidad de 10 m/s. Se acelera Durante 12s y aumenta su velocidad hasta 70 m/s ¿Que aceleración experim

VladimirAG [237]

Answer:

Aceleracion = 5 m/s²

Explanation:

Dados los siguientes datos;

Velocidad inicial = 10 m/s

Velocidad final = 70 m/s

Tiempo, t = 12 segundos

Para encontrar la aceleración;

Aceleración se puede definir como la tasa de cambio de la velocidad de un objeto con respecto al tiempo.

Esto simplemente significa que la aceleración viene dada por la resta de la velocidad inicial de la velocidad final a lo largo del tiempo.

Por lo tanto, si restamos la velocidad inicial de la velocidad final y la dividimos por el tiempo, podemos calcular la aceleración de un objeto. Matemáticamente, la aceleración viene dada por la fórmula;

$Aceleracion = \frac{final \; velocidad - inicial \; velocidad}{tiempo}$

Sustituyendo en la fórmula, tenemos;

$Aceleracion = \frac{70 - 10}{12}$

$Aceleracion = \frac{60}{12}$

Aceleracion = 5 m/s²

8 0

3 years ago

Based on Newton's law of motion, which combination of rocket bodies and engine will result in the acceleration of 40 m/s ^2 at t

ad-work [718]

The question is incomplete. The complete question is :

The Rocket Club is planning to launch a pair of model rockets. To build the rocket, the club needs a rocket body paired with an engine. The table lists the mass of three possible rocket bodies and the force generated by three possible engines.

A 4-column table with 3 rows. The first column labeled Body has entries 1, 2, 3. The second column labeled Mass (grams) has entries 500, 1500, 750. The third column labeled Engine has entries 1, 2, 3. The fourth column labeled Force (Newtons) has entries 25, 20, 30.

Based on Newton’s laws of motion, which combination of rocket bodies and engines will result in the acceleration of 40 m/s2 at the start of the launch?

Body 3 + Engine 1

Body 2 + Engine 2

Body 1 + Engine 2

Body 1 + Engine 1

Solution :

Given :

Body Mass (gram) Engine Force (newtons)

1 500 1 25

2 1500 2 20

3 750 3 30

The body 1 has a mass of 500 gram which is equal to 0.5 kg

And engine 2 has a force of 20 newtons.

We know that according to Newton's laws of motion,

Force = mass x acceleration

20 = 0.5 x acceleration

Acceleration $=\frac{20}{0.5}$

$=\frac{200}{5}$

$= 40 \ m/s^2$

Therefore, based on laws of motion of Newton, the Body 1 + Engine 2 combination of the rocket bodies and engines will result in an acceleration of $40 \ m/s^2$ at the start of the launch.

8 0

3 years ago

Determine whether each statement concerning different wavelengths of light is true or false.

OlgaM077 [116]

Answer:

Light with a wavelength of 100 nm is completely absorbed by the atmosphere. True

Light with a wavelength of 400 nm has the color of red. False

Light with a wavelength of 280 nm is in the ultraviolet region. False

Explanation:

Light of wavelength 0-100nm can be absorbed by the earths atmosphere

Ultraviolet light ranges between 320-400nm hence the statement above is false.

The wavelength of red colour is around 620-700nm hence the statement above is false.

3 0

3 years ago

In physics class, Anne is designing a small circuit that can operate a mixer. Identify the devices she should use in the circuit

Lubov Fominskaja [6]

To operate a mixer circuit , Anne should use a (motor, buzzer, bulb, or battery) to transfer electric energy into motion. She should also use a (switch, resistor, buzzer, or bulb) to start and stop the flow of current.

An electric-powered circuit consists of a device that gives energy to the charged particles constituting the modern-day, consisting of a battery or a generator; devices that use cutting-edge, including lamps, electric cars, or computer systems; and the connecting wires or transmission traces.

An electrical circuit is an interconnection of electrical components or a version of such an interconnection, consisting of electrical elements. an electrical circuit is a network along with a closed loop, giving a go-back direction for the cutting-edge.

An electrical circuit consists of a source of electrical strength, two wires that can convey electric power present day, and a mild bulb. One stop of both the wires is hooked up to the terminal of a mobile at the same time as their free ends are related to the light bulb. the electric circuit is damaged while the bulb is switched off.

Learn more about the circuit here:-brainly.com/question/2969220

#SPJ1

7 0

1 year ago

What are the 3 properties of magnetics

fredd [130]

Answer:

they point north and south directionwhen suspende freely

the poles exist in pairs

they attract magnetic substance

6 0

3 years ago