Physics Exercise 2.10

This is for those who didn't manage to jot down the questions in class earlier today. Solve the questions in your exercise books.

1. A crane lifts a load of 5000N through a vertical distance of 12m from a ship to the ground in 20s. Calculate the average power of the crane. [ Unit of Energy: Joule (J) ]

2. A rock of mass 4.5kg falls from a height of 14m to the ground. Calculate the loss of potential energy when the rock is 5m above the ground.

3. An electric motor lifts a box of mass 5.0kg to a height of 18m in 5s. Calculate the power of the motor.

4. A lift in a building can carry 15 people through a height of 10m in 10 seconds. The total mass of the lift and its passengers is 1500kg. Calculate the power of the lift.

5. A fat man of mass 100kg and a thin man of mass 50kg both ran up a flight of stairs at a height of 12m. Both the men took 10s to complete the task. Calculate the power generated by each man.

6. The graph in figure below shows the relationship between force, F and the spring extension, x.

Calculate the work done to stretch the spring from 8cm to 12cm.

7. An electric motor of a crane rated 500W can lift a load of 450N vertically through a height of 8m in 10s. Calculate the efficiency of the motor.

*Refer to your notebook if you're stuck at any question.

Shifted - Assessment 2

Just a little announcement in case you didn't notice the announcement on the board earlier. Tomorrow the Physics and Add Maths test is shifted to after recess. According to the schedule, it was suppose to be before recess but Mr Shukur just told me this morning that it was shifted to after recess. So, I don't really know which one to follow either. So, I'd suggest you just bring all the books required in our original class timetable. Add Maths and Physics lessons is on the same day too. So, it shouldn't be a problem.

That should sum it up.

SEGAK the 2nd

This notice apply to boys only.
As the title suggest, we'll be doing our SEGAK test tomorrow. So, you have to bring your PJ attire.

Got really nothing much to say. So, this is the end of the post. If you want to check the timetable for our test, you can check it below. Just scroll down and you'll see it.

p/s to Fudin and Parri: Remember to bring your form for the camp tomorrow.

Assessment the 2nd Story

*Amaran: Terdapat unsur pessimistik dalam perenggan di bawah.

As you might have been informed, our second assessment is taking place next week. This time around, there isn't much of a chance of obtaining leaked questions. So if you mind about your results, you have to buck up and shove those knowledge deep down in your brains. That way, you'll be ready for the upcoming test.

A Simpler Version of the Original Timetable

Monday (Jul 20) - BM [10.55 - 11.55]

- Maths [ 12.05 - 1.05]

Tuesday (Jul 21) - English [ 10.55 - 11.55]

- Chemistry [ 12.05 - 1.05]

Wednesday (Jul 22) - History [10.55 - 11.55]

- AM1 [ 12.05 - 1.05]

Thursday (Jul 23) - Physics [7.45 - 8.45]

- Add Maths [ 9.05 - 10.05]

Friday (Jul 24) - Biology {[7.45 - 8.45], [9.05 - 10.05]} I don't really know which one. Both the time frame are within the timetable.

*Answer the questions in your exercise books or your own paper. (If a specific instruction is issued, this particular rule is void and null)

* For subjects not included in the timetable, teachers will conduct the assessment according to the normal timetable.

* Teachers will resume P&P sessions during the time when assessments are not being conducted.

-Done-

Btw, we have a new addition to our class. I'm sure you have noticed, haven't you? It's Yvonne!!! [No specific reason for the exclamation marks, mind you]. Okay guys, I know you don't really like her, but don't go "Oh, there's Yvonne. That's the first time I've seen one." or "Oh, there's such as thing called a Yvonne?". That's a bit too harsh, isn't it? I don't really know in detail why you don't welcome her but just be a little considerate. Try looking at these things in her perspective and you'll understand why I even mentioned this.

Of Kekacang and Juices...

As the title suggest, I shall commence Operation Juice of Kacang Post.

As you might have been informed, we will be doing the peanut and juices experiment. You can refer the experiment in your Practical Book. It's experiment 6.1 and 6.3. So assuming you have formed a group of 4, you have to divide your group to 2 subgroups namely Group A and B.

The following are the materials you need to bring tomorrow.

....Group A....
1) Lime Juice
2) Orange Juice
3) Random Juice

*The juices must not be bought as the ones in stores contain preservatives and sugar. So, obviously you can't add other stuffs like sugar to the juices that you did either. Don't take the easy way out of using cordial.

*WARNING: DO NOT CONSUME THE TEMPTING BEVERAGES ORALLY, ANALLY OR THROUGH YOUR RESPECTED NOSTRILS.


....Group B....
1) Crackers (without cream)
2) Bread (make sure it's not wet or anywhere close to it)
3) Peanuts (any type will do be it almonds, cashew, pistacio, and even ground nuts)

*WARNING: DO NOT CONSUME THE NOWHERE-NEAR TEMPTING FOODS ORALLY, ANALLY OR THROUGH YOUR RESPECTED NOSTRILS.

YOUR FAILURE OBEYING THE WARNINGS WILL RESULT IN AN ENTROPY OF THE FROG DISSECTING EXPERIMENT.

*Entropy can be referred to in Wikipedia. I don't really know how to use the word properly actually.

p/s: The photos taken with Ms Lim can be viewed in Facebook under Ms Lim's profile. You can search her in Facebook by searching Lim Chiu Sin.

Farewell... Ms Lim

As you might have known, Ms Lim is heading back to Johor. So according to Sugu, a party of some sort will be held on Friday or was it just some cake-eating event? Please pass on your RM2 to the Bendahari (Fudin; formerly Johanan) and he'll pass it to Sugu. And Sugu'll go and buy the cake. Your payment can be made before the school ends. We should apologize for whatever trouble we caused her before she leaves. So yalah, that's all.

You can ignore this part since there's no proper message in here.

Don't really have anything to say actually. Just that I noticed that this particular post is too short and I'm seriously bored so, I just posted something here.