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3 years ago

What is the energy put into a machine or device to make it work

Physics

1 answer:

Neporo4naja [7]3 years ago

4 0

Answer:

The energy put into a machine or device to make it work is named work input.

Explanation:

Machines are devices to perform tasks with less effort or more easily. They can either increase the force applied or change the direction of the force or permit to apply the force at a distance.

The law of conservation of energy states that the energy is neither created nor destroyed, but when the machines do work some energy is dissipated in the form of heat, light or sound, due, mainly to friction.

In consequence, the work output is less than the work input.

A measure of energy use is efficiency. The efficiency is the ratio of the work output to the work input.

$Efficiency=\dfrac{\text{Work done by the machine}}{\text{Work done on the machine}}$

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a 2.5 kg mass is hung from the 0 cm mark on a 1 kg meter stick. a mass of 0.5 kg is hung from the 100 cm mark of the meter stick

Keith_Richards [23]

The center of mass of this system is 25 cm.

The middle of mass of a distribution of mass in the area is the particular factor in which the weighted relative function of the distributed mass sums to zero. this is the factor to which a force may be implemented to reason a linear acceleration without an angular acceleration.

Calculation:-

X centre of mass = (0 × 2.5) + ( 1× 50) + (0.5 × 100) / 2.5 + 1 + 0.5

= 25 cm

The center of mass is a role defined relative to an object or machine or gadget. it is the average position of all of the parts of the gadget, weighted according to their masses. For easy rigid objects with uniform density, the middle of mass is placed on the centroid.

Learn more about the center of mass here:-brainly.com/question/28021242

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3 0

1 year ago

Light of wavelength 480 nm illuminates a double slit, and the interference pattern is observed on a screen. At the position of t

vova2212 [387]

Answer:

BC =980nm

Explanation:

Given wavelength =490nm

m=2

Required to find (OB - OC) = BC (more distant slit - nearest slit ) = dsin theta

We have dsin theta = m*wavelength

or BC = m* wavelength = 2*490nm

= 980nm = 98.000A

4 0

3 years ago

A 16 g rifle bullet traveling 240 m/s buries itself in a 3.6 kg pendulum hanging on a 2.5 m long string, which makes the pendulu

iren [92.7K]

Answer:

x = 0.54 m

y = 0.058 m

Explanation:

m = mass of the bullet = 16 g = 0.016 kg

v = speed of bullet before collision = 240 m/s

M = mass of the pendulum = 3.6 kg

L = length of the string = 2.5 m

h = height gained by the pendulum after collision

V = speed of the bullet and pendulum combination

Using conservation of momentum

m v = (m + M) V

(0.016) (240) = (0.016 + 3.6) V

V = 1.062 m/s

Using conservation of energy

Potential energy gained by bullet and pendulum combination = Kinetic energy of bullet and pendulum combination

(m + M) g h = (0.5) (m + M) V²

(9.8) h = (0.5) (1.062)²

h = 0.058 m

y = vertical displacement = h = 0.058 m

x = horizontal displacement

horizontal displacement is given as

x = sqrt(L² - (L - h)²)

x = sqrt(2.5² - (2.5 - 0.058)²)

x = 0.54 m

8 0

3 years ago

Find the momentum of a 25kg object traveling at a speed of 4m/s

solong [7]

Answer:

100Kg.m/s

Explanation:

From the question, we obtained the following information:

M= Mass = 25kg

V = Velocity = 4m/s

Momentum =?

Momentum = MV = 25x4= 100Kg.m/s

8 0

4 years ago

¿Que trabajo realizas cuando subes una bolsa de la compra cuya masa es 4,5 kg desde el suelo hasta una mesa de 90 cm de altura?¿

WITCHER [35]

We are going to do this today

6 0

3 years ago