In a machine shop two cams are produced one of aliminuam and one of iron both cams have the same mass.Which cam is larger, show the work

Q: Calculate the amount of work done if a 300 N object is lifted to a height of 2.5 m.

A: Given that Weight of object F = 300 N Height h = 2.5 m

Q: If the units of length and force are increased four times, then the unit of energy will: (A)…

A: Given data--- unit of length and force = 4 time increases . We have to find--- unit of energy  ?

Q: What is the difference between energy and power?

A: S.No Energy Power 1 Capacity to do work Amount of work done 2 It is measured in Joules It…

Q: A pump needs to lift 526 litres of water per minute to a height of 13.2 m.  What is the minimum…

A:

Q: The unit kilowatt-hour is a measure of(a) the rate at which energy is transformed.(b) power.(c) an…

A: kilowatt hour

Q: person lifted a bag of groceries 2.89 m from the floor onto a counter top using a constant force of…

A:

Q: Which one of the following is not the unit of energy

A: The formula of Energy is, E=F.d From above, unit of energy is Newton.-meter. The SI unit of energy…

Q: A force of 1.5N makes an angle of 12° (counter-clockwise) with the +X axis. The Y componen the force…

A: Given  F = 1.5 N  Angle = 12 degree counter clockwise  So F can be resolve into two components  One…

Q: A laptop computer uses 75W of power in one hour. Electricity costs 5.6¢ /kW-h. Calculate how much it…

A:

Q: Work done on a system puts energy into it. Work done by a system removes energy from it. How will…

A: Energy is a scalar quantity and exists in many forms, namely mechanical, thermal, chemical, atomic,…

Q: Power is the rate of change in energy, regardless of whether the change is due to transformation,…

A: The rate of change in energy is called power. Energy cannot be destroyed, it can be transferred or…

Q: Distinguish between kinetic and potential energy in the following examples:two separated magnets; an…

A: 1) The potential energy between the pair of magnets determined by the distance between them, whereas…

Q: A force of 800 newtons stretches a spring of 70 centimeters on a mechanical device for driving fence…

A:

Q: Which of the following devices converts electric energy into mechanical energy?

A: The given statement is  Device which converts electric energy into mechanical energy?

Q: Fill in the blank: An object is moving to the right. A force acts rightward upon it. This force is…

A: The expression of the work done by a force is: W=F·d=Fdcosθ Here, θ is the angle between force…

Q: The unit of measurement of energy in a given amount of food

A: Our question is what is the unit of measurement of energy in a given amount of food

Q: kilowatt (kWh)

A:

Q: 94. Which of the following is a unit of energy?* O a. W O b. kg m/s O c.J O d. m/s

A: Energy : Energy is defined as the capacity of doing work.

Q: 17. Which of the following must occur for work to be done on an object? O the object must rotate the…

A:

Q: Forgiving person as the time needed to run up a flight of stairs decreases the power does what

A: When the force is applied on a body,the work is done by the system to move it by a distance. Work…

Q: Match the following Height of an object is Choose... doubled Energy due to motion Choose... Speed of…

A:

Q: How much work is required to lift a 4 kg concrete block to a height of 3 meters

A:

Q: What is the power of a light bulb if it uses 120J of energy in 4.0 seconds? Your answer: O 0.033 W O…

A: Given data : Energy used by light bulb, Time taken,

Q: A pump needs to lift 549 litres of water per minute to a height of 14.7 m.  What is the minimum…

A: Power is defined as the rate of doing work. The work done in this case is just the change in the…

Q: laptop cost to operate for 10 hours

A:

Q: The principle of conservation of energy is represented by

A: For conservative forces, the total mechanical energy (= potential energy + kinetic energy) is…

Q: Choose the BEST answer to the following: The potential energy of a compressed spring and the…

A: The potential energy of a compressed spring and the potential energy of a charged object both…

Q: A new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to…

A: The expression for the power output is,

Q: Scissors for cutting paper have long blades and short handles, whereas metal-cutting shears have…

A:

Q: A man is lifting a 1 bag of cement in unknown direction with a magnitude of 10 meters and a height…

A: Given, Mass of bag,m=1 kg Height,h=7 m

Q: Law of conservation of energy is a false idea. Choose from the choices below:     True       False

A: Law of conservation of energy states that energy of a system is always conserved.

Q: What is Potential energy

A: Potential Energy: “It is the energy stored in a body or system by virtue of its position in a field…

Q: State the principle of conservation of energy.

A: The principle of conservation of energy states that energy cannot be created or destroyed, that is…

Q: A job is done slowly, while an identical job is done quickly. Both jobs require the same amount of…

A: Both will have different power.

Q: A dog chasing a ball through a field has 7,500 J of kinetic energy. What is the dog's mechanical…

A: Mechanical energy is addition of kinetic energy and potential energy.

Q: All of the following refers to power, except the rate of doing work by a system

A: Poer is rate of doing work. P=Wt its unit is J/s or Watt. Change in energy per unit time is also…

Q: An electric hoist does 197000 J of work in raising a 226.3 kg load. How high was the load lifted

A: Work done is given by  W = m g h  where, m is the mass, g is the gravity and h is the height.

Q: You are tasked with designing a new motor that is based off of an older model. The new model…

A: Given data:  Work done by new model (W') = 1.5W Time taken by new model (t') = 0.5t Required: New…

Q: A new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to…

A: Force, F = 990 N Distance, d = 14 m  Time, t = 22 s

Q: Which one of the following is not the unit of energy? 1) Joule 2) Watt-hr 3) Newton-metre 4)…

A: From the given option, the unit of power is Joule, Newton-meter, Kg-meter/s 2

Q: If a machine exerts a force of 250 n of an object and no work is done what must have occurred

A:

Q: A force of 20 N acted upon a 5kg object, lifting it 1.5m. Calculate the work done on this object.

A: Given: The mass of the object is 5 kg. The force on the object is 20 N. The displacement of the…

Q: Energy is lost in a vacuum due to air resistance. TRUE or FALSE.

A: First let's understand what is vacuum? VACUUM: vacuum is a space in which there is no matter. Air…

Q: Why is it useful to use power?

A: Power can be obtained by dividing the total amount of work done per unit of time and it is measured…

Q: When driving from home to the grocery store you are using the chemical potential energy in the…

A:

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.