मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता ६ वी

The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.

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प्रश्न

The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.

रिकाम्या जागा भरा
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उत्तर

The load in the centre, the fulcrum on one side and the effort on the other side make a lever of the second order.

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पाठ 12: Simple Machines - Exercises [पृष्ठ ९०]

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बालभारती General Science [English] Standard 6 Maharashtra State Board
पाठ 12 Simple Machines
Exercises | Q 2.2 | पृष्ठ ९०
बालभारती General Science Integrated [English] Standard 6 Maharashtra State Board
पाठ 12 Simple Machines
Exercise | Q 2. (b) | पृष्ठ ९९

संबंधित प्रश्‍न

State whether the following statement is True or False.

A boy does work while pushing a wall.


Can a machine have an efficiency of 100%? Give a reason to support your answer.


Derive the relationship between mechanical advantage, velocity ratio and efficiency of a machine.


Fig show a system of four pulleys. The upper two pulleys are fixed and the lower two are movable. 

(i) Draw a string around the pulleys. Also show the place and direction in which the effort is applied.

(ii) What is the velocity ratio of the system?

(iii) What is the mechanical advantage of the system?

(iv) What assumption do you make in arriving at your answer in part (iii)?


Define Velocity Ratio


Fig. shows a spade. It is being used to lift soil weighing 30N from the ground.

(a)    Mark the direction of the least force on the handle necessary to keep the spade balanced. 
(b)    Calculate the least force on the handle necessary to keep the spade balanced (the weight of the spade is negligible).
(c)    If the left hand was move towards the soil on the spade, would the force on the handle necessary to keep the soil balance the greater or less? Give a reason for your answer.
(d)    To which class of lever does the spade belong?


Establish a relationship between efficiency, M.A., and V.R.


Classify the following as a lever, a pulley and an inclined plane:

An axe


Classify the following as a lever, a pulley and an inclined plane:

A knife


Name the levers mentioned in the following passage. Identify the fulcrum, load, and effort of each and say which type of lever it is.

Ravi and Savita sit on a seesaw in a garden. In the meantime, a gardener is trimming trees in the garden. He puts the leaves and other garbage in the wheelbarrow. Later, Ravi gets thirsty and he buys lemon sherbet. The sherbet seller cuts the lemon and squeezes it using a lemon squeezer. He puts small pieces of ice in the glass with the help of the tongs.


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