The Work Done In Lifting A 30 Kg Set Of Bricks To A Height Of 20m Is

The work done in lifting a 30 kg set of bricks to a height of 20m is

 

We all know the FORMULA IN FINDING WORK is

W = F x D

Where W is work;

F is force; and

D is distance

However, let us first discuss what work really is.

When there is an object being moved by a force through a certain distance, the measure of energy transfer is what we call WORK.

One of the most common units used in work is JOULES (commonly used as a unit of energy). It is the work by which 1 Newton (1N = 1 kg.m/sec^2) of force is used/expended through a distance of 1 meter (1m).

Refer to the problem.

It is said that the 30 kg set of bricks are to be raised in a height of 20 meters. As we see, there is no force given. But recall that force (F) is the product of mass (m) of an object and its acceleration (a)

F = ma

However, in the formula, (g = 9.81 m/s^2) or acceleration due to gravity is used in replacement of (a) because the object is moving upward.

So now we have  

F = mg

Thus, we have the new work formula as

W = (mg)(D)

Substituting the given values, we have

W = (mg)(D)

W = (30kg)(9.81 m/s^2)(20m)

W = 5,886 kg.m^2/sec^2 or W = 5,886 Joules

Thus, the work done in lifting the bricks is 5,886 Joules or 5.886 KJ.

For more related problems, seee links below.

brainly.ph/question/1742925

brainly.ph/question/1650309

brainly.ph/question/1031046


Comments

Post a Comment

Popular posts from this blog

Can You Imagine Living Without Television, Phone, Radio And Any Other Tool For Information And Communication?

CAn you imagine living without television, phone, radio and any other tool for information and communication?   Yes, and I know that I can survive. there are lots of ways to provide our survival needs it is through our environmental resources. ancient people survived without any of these technology because they use their own strategic analysis abilities to live. and without having these capabilities then its your own choice on how to survive. Besides using strategic analysis seems to be practical. We shouldnt always rely on technology that much because we will be enslaved by it. If we will be talking about technology, the things that we should always remember is that, our life doesnt revolve nor depend upon technology. Lets say yes it seems to be a life saver but if were going to compare it to the life line of the ancient people to this new peoples generation, ancient people lives longer, while we modern people... different age, ethnicity, etc. dies easily even the younger ones. I
Read more

Nona Is One-Third As Old As Her Mother. Five Years Ago, She Was Only One Fifth Of The Age Of Her Mother. How Old Is Nona Now

Image
Nona is one-third as old as her mother. Five years ago, she was only one fifth of the age of her mother. How old is nona now   Answer: Nona is 10 years old today. Step-by-step explanation: Step 1: Assigning variable. The age of Nonas mother will be expressed in " x ". On the other hand, Nonas age will also be expressed as a fraction of x (or a fraction of her mothers age) . Always remember that it will be easier if both Nona and her mother is expressed in both variable. Step 2: Interpret the first statement "Nona is one-third as old as her mother" At present: Since the age of Nonas mother is expressed in x, then equation one and two will be Step 3: Interpret the second statement "Five years ago, she was only o ne fifth of the age of her mother" Five years ago: Age of Nonas mother= x -5 (where -5 represent "five years ago") Since Nonas age is expressed as a fraction of her mothers age, then the equation three and four will be Note: If the s
Read more

What Changes (Temperature And Kinetic Energy) Takes Place In The Melting Process?

What changes (temperature and kinetic energy) takes place in the melting process?   Changes in temperature and kinetic energy take place during phase change, in this case the melting process, because a melting object takes in thermal energy from its environment. The temperature of a melting object increases , this is because the object takes in heat from the environment in an attempt to achieve equilibrium as stated in the laws of thermodynamics. Also, once an object takes in thermal energy, its kinetic energy also increases. Remember that temperature is just the measure of kinetic energy (in the atomic level, via vibration of atoms) an object has. If the temperature increases, we can say that the kinetic energy of an object (in the atomic level) increases. For more information about thermal energy, heat, and melting, you may check the links below. brainly.ph/question/803878 brainly.ph/question/808302 brainly.ph/question/205501
Read more