Philip King

science.sport.music
 
الرئيسيةاليوميةس .و .جبحـثالتسجيلدخول

شاطر | 
 

 What's a machine worksheet

استعرض الموضوع السابق استعرض الموضوع التالي اذهب الى الأسفل 
كاتب الموضوعرسالة
Philip King
Admin


عدد المساهمات : 44
تاريخ التسجيل : 28/10/2012
العمر : 18
الموقع : zakho

مُساهمةموضوع: What's a machine worksheet   الإثنين نوفمبر 12, 2012 7:02 pm

Define
Machine……………………………………………………………………………………………………………
………………………………………………………………………………………………………………………….
Work input………………………………………………………………………………………………………..
………………………………………………………………………………………………………………………….
Work output……………………………………………………………………………………………………..
………………………………………………………………………………………………………………………….
Mechanical advantage………………………………………………………………………………………
…………………………………………………………………………………………………………………………
Mechanical efficiency………………………………………………………………………………………
………………………………………………………………………………………………………………………..
Fill in the blank?
1 – a machine is a device that makes work easier by changing the …………..or ………….
Of a force. When a machine change the amount of force the ………………………. Must be change too.
2- the work you do on a machine is called ……………………….by using a force called…………. Force.
3- the work done by a machine is called ………………………….by using a force called …………… force.
4- work …………..can never be greater than work ……………..

6- mechanical advantage a number that tells how many times a ……………….. multiplies ……………
7- the mechanical advantage comares the ……………..force with the ……………..force.
8- the equation used to calculate the mechanical advantage is (MA)= …………………………………..
9- a quantity that mesures the ratio of work output to work input is ………………………………............
10 mechanical advantage is usually expressed as a ……………………………..
11- mechanical advantage can be calculated by …………………………work output by work input.
12- some work of the work done by a machine is used to overcome the ……………………. Created by the use of the machine.
13- the equation used to calculate e work mechanical efficiency is =……………/……………*……….
14 an ………… machine would be a machine that had 100% mechanical efficiency.
15 ……………….parts use some of the work input to overcome friction.
Answer?

1-what is the equation of mechanical advantage?
2- what is the equation of mechanical efficiency?
3- How do machines make work easier?
4- why work output of a machine is always less than work input?
5- what are the two things that a a machine can change about how work is done?

Calculate?

1- 1-To pull a weed out of a garden, you can apply a force of 50 N to the shovel. The shovel applies a force of 600 N to the weed. What is the mechanical advantage of the shovel?

2-To lift a block on a movable pulley, you can apply a force of 50 N to a rope. The rope applies a force of 700 N to the block. What is the mechanical advantage of the rope?

3-suppose that you apply an input force of 40N to a handcart .the cart applies an output force of 320 N to the stack of canned food . what is the mechanical advantage?
الرجوع الى أعلى الصفحة اذهب الى الأسفل
معاينة صفحة البيانات الشخصي للعضو http://philip-kingforever.ahlamountada.com
 
What's a machine worksheet
استعرض الموضوع السابق استعرض الموضوع التالي الرجوع الى أعلى الصفحة 
صفحة 1 من اصل 1

صلاحيات هذا المنتدى:لاتستطيع الرد على المواضيع في هذا المنتدى
Philip King :: الفئة الأولى :: المنتدى الأول :: Science Subjects 9th grade :: Physics-
انتقل الى: