Is there a 100 percent efficient machine?

Is there a 100 percent efficient machine?

The short answer is: It can’t. Almost all machines require energy to offset the effects of gravity, friction, and air/wind resistance. Thus, no machine can continually operate at 100 percent efficiency.

What is the formula for calculating power?

Power = force multiplied by speed (velocity) P = F × v.

How do you calculate work on a calculator?

Formula

1. Work : W = Fd (work = force x distance)
2. Force : F = W/d.
3. Distance : d = W/F.
4. Where, W =Work, F = Force, D = Distance.

What are 4 ways energy can be transferred?

There are 4 ways energy can be transferred;

• Mechanically – By the action of a force.
• Electrically – By an electrical current.
• By radiation – By Light waves or Sound waves.
• By heating – By conduction, convection or radiation.

What is the rate at which work is done or energy is transferred?

power: A measure of the rate of doing work or transferring energy. watt: In the International System of Units, the derived unit of power; the power of a system in which one joule of energy is transferred per second.

How can force be transferred?

Forces are transferred.” “This also says that when a string is pulling on something, the force is transferred through the string” “Even more – here it says when you push on an object, the force is transferred through the object to the other atoms on the other side of the object. Clearly, forces are transferred.”

What will an object do if it has inertia?

The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.

How is energy transferred from one person to another?

Energy is transferred from one object to another when a reaction takes place. Energy comes in many forms and can be transferred from one object to another as heat, light, or motion, to name a few. This energy would be in the form of motion, with the person lifting the blue ball to a higher level.

Is work done and Energy same?

There is a significant difference between work and energy. Work is the transferring of an amount of energy with the help of a force covering a particular distance through a direction. Energy is also referred to as the force which works at a certain distance.

In which situation is work done?

Work is done whenever a force or a component of a force results in a displacement. No component of the force is acting in the direction of motion when the book is moved horizontally with a constant velocity. The force and the displacement are independent. No work is done by the hand on the book.

Why is work and energy Same?

Energy is transferred to an object and work is done on the object or by the object. So, we can say that their units must be the same as the energy is what is lost or gained by doing work on an object or by the object. Note: The SI unit of both the work and energy is Joule.

How do you calculate work and energy?

Mechanics: Work, Energy and Power

1. Work = Force • Displacement • Cosine(theta)
2. W = F • d • cos(theta)
3. Power = Work / time.
4. P = W / t.
5. P = F • cos(theta) • (d/t)
6. P = F • v • cos(theta)
7. PEgrav = m•g•h.
8. KE = 0.5 • m • v2

How can energy be consumed when no work is done?

This energy comes from the chemical energy in your body and most of them are converted into heat and lost to the surrounding. In this situation, no energy is transferred to the book, so no work is done. You can feel the different energy consumption when your arm is stretched in different angle.

Is work a form of energy?

Work is a form of energy. A Watt is the standard metric unit of work. Units of work would be equivalent to a Newton times a meter.

Is pressure a type of energy?

According the kinetic theory of ideal gases [181], air pressure can be defined as the average momentum transfer per unit area per unit time due to molecular collisions between a confined gas and its boundary.

Is work done yes or no?

NO WORK IS DONE if the force you exert does not make the object move. Work is done when the force (F) applied to the object causes the object to have a displacement (d) in the same direction as the force applied. 6. A GIRL IS PULLING HER TOY CAR • Yes, the situation is an example of work.

What are the two basic kinds of energy?

Many forms of energy exist, but they all fall into two basic categories:

• Potential energy.
• Kinetic energy.

What are the 7 main types of energy?

The different types of energy include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy and gravitational energy.