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3 years ago

15

Explain the conversion of energy in a roller coaster. Explain how energy is converted

1 answer:

tatuchka [14]3 years ago

5 0

As the rollercoaster goes up. kinetic energy changes to gravitational potential energy. When it moves back down, gpe changes back to ke.

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A bulldozer does a work of 50,000

puteri [66]

Answer:

Force applied by bull dozer is 3333.33 joules.

Explanation:

3 0

3 years ago

Una barra metálica de 2 m de largo recibe una fuerza que lo provoca una alargamiento o variación en su longitud de 0.3 cm ¿Cuál

Elan Coil [88]

Answer:

La deformación unitaria lineal experimentada por la barra es $1.5\times 10^{-3}$ .

Explanation:

De la Mecánica de Materiales sabemos que la deformación unitaria lineal es la razón de la variación de la longitud con respecto a su longitud inicial. Al asumirse que la variación longitudinal es muy pequeña con respecto a la longitud inicial, se puede utilizar la siguiente ecuación:

$\epsilon = \frac{\Delta l}{l_{o}}$ (Eq. 1)

Donde:

$\epsilon$ - Deformación unitaria, adimensional.

$\Delta l$ - Cambio longitudinal, medido en metros.

$l_{o}$ - Longitud inicial, medida en metros.

Si conocemos que $\Delta l = 3\times 10^{-3}\,m$ y $l_{o} = 2\,m$ , entonces la deformación unitaria lineal es:

$\epsilon = \frac{3\times 10^{-3}\,m}{2\,m}$

$\epsilon = 1.5\times 10^{-3}$

La deformación unitaria lineal experimentada por la barra es $1.5\times 10^{-3}$ .

3 0

4 years ago

A 20 kg truck drives in a circle of radius 4 m at 10m/s. What is the centripetal acceleration of the truck?

asambeis [7]

Answer:

B. 25 m/s/s

Explanation:

Centripetal acceleration is the square of the tangential velocity divided by the radius of curvature.

a = v² / r

Given v = 10 m/s and r = 4 m:

a = (10 m/s)² / 4 m

a = 25 m/s²

4 0

3 years ago

Answer each question yes or no. Assume the motions and currents mentioned are along the x axis and fields are in the y direction

Sergeeva-Olga [200]

(a) Does an electric field exert a force on a stationary charged object? YES ( F = Eq)

(b) Does a magnetic field do so?- NO ( F= qvB)

(c) Does an electric field exert a force on a moving charged object? YES

(d) Does a magnetic field do so? YES ( F = qvB)

(e) Does an electric field exert a force on a straight current-carrying wire? ( NO)

(f) Does a magnetic field do so? Yes

(g) Does an electric field exert a force on a beam of moving electrons? Yes

(h) Does a magnetic field do so? YeS

To know more about magnetic field visit : brainly.com/question/10353944

#SPJ4

6 0

2 years ago

The dogs of four-time Iditarod Trail Sled Dog Race champion Jeff King pull two 100-kg sleds that are connected by a rope. The sl

azamat

Answer:

Part a)

$a = 2.4 m/s^2$

Part b)

$F = 120 N$

Explanation:

Two sleds are connected by a rope

mass of each sled is given as

$m = 100 kg$

now we know that dog exert pulling force on the rope connected to first sled

$F = 240 N$

Part a)

By newton's first law we know that

$F = (m + m)a$

$240 = (100 + 100)a$

$a = \frac{240}{100}$

$a = 2.4 m/s^2$

Part b)

As we know that force between two ropes will pull the sled behind

so we will have

$F = ma$

$F = 100(1.20)$

$F = 120 N$

7 0

3 years ago

Read 2 more answers