11th Class Physics Chapter 4 Work and Energy Short Question Answers Below
We are providing all Students from 5th class to master level all exams preparation in free of cost. Now we have another milestone achieved, providing all School level students to the point and exam oriented preparation question answers for all science and arts students.
After Online tests for all subjects now it’s time to prepare the next level for Punjab board students to prepare their short question section here. We have a complete collection of all classes subject wise and chapter wise thousands questions with the right answer for easy understanding.
Here we are providing complete chapter wise Physics questions and Answers for the 11th class students. All the visitors can prepare for their 11th class examination by attempting below given question answers.
In this List we have included all Punjab boards and both Arts and Science students. These Boards students can prepare their exam easily with these short question answer section
Lahore Board 11th classes short questions Answer
Rawalpindi Board 11th classes short questions Answer
Gujranwala Board 11th classes short questions Answer
Multan Board 11th classes short questions Answer
Sargodha Board 11th classes short questions Answer
Faisalabad Board 11th classes short questions Answer
Sahiwal Board 11th classes short questions Answer
DG Khan Board 11th classes short questions Answer
Bahwalpur Board 11th classes short questions Answer
All above mention Punjab Boards students prepare their annual and classes test from these online test and Short question answer series. In coming days we have many other plans to provide all kinds of other preparation on our Gotest website.
How to Prepare Punjab Board Classes Short Question Answer at Gotest
- Just Open the desired Class and subject which you want to prepare.
- You have Green bars which are Questions of that subject Chapter. Just click on Bar, it slides down and you can get the right answer to those questions.
- You can also Rate those question Answers with Helpful or not to make it more accurate. We will review all answers very carefully and also update time to time.
Now you can start your preparation here below
Thus in both the situations the work done is zero.Therefore from the standpoint of work these two situations are similar.
W=F→.d→= Fd cos0
Where 0 is the angle between force F→ and displacement d→.
Hence,0=60ᵒ so the expression becomes
Mass of body =m= 1kg
Acceleration due to gravity =g=-9.8ms-2
Work done = P.E =mgh
Putting the values we get
Hence W=98J Ans
Height of the ladder =h/=10m
Height up to middle of ladder=h= h//2=5m
Using the formula of P.E.
P.E.=W×h, putting the values,we get
It is commercial unit of electric energy.
To show that 1 KWH=3.6 MJ
1KWH =1000 watt×3600 s
36×105 watt –s
Hence 1KWH =3.6Mj
W=F→.d→.=Fd cos0……………… (i)
Since frictional force is always apposite to the direction of motion of a body,Therefore the angle between force and displacement will be 180ᵒ.
Now equation (1) can be written
W=Fd cos 180ᵒ
Hence,the work done against frictional force is negative.
In case of any Query or Question regarding 11th Class Physics Chapter 4 Work and Energy Short Question Answers then please leave your opinion below in comments section respectively.