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_______ is a push or pull.
Which is not an effect of force?
The force exerted by our muscles is called ________.
The force used by machines is called _________.
The force applied in a bow and arrow is __________.
The earth pulls all objects towards its centre with a force called _______.
Which force is in action when the leaves fall down from the trees?
Which force is in play when an object moves over the other?
The frictional force acts ________ to the direction of the motion of an object.
Physical or mental activity refers to _________.
The tools that make our work easier are called ______.
How many types of basic simple machines are there?
Which is not an example of a lever?
A ___________ is made up of a grooved wheel and a rope.
A wheel is fixed to a rod called __________.
Which of these is not an example of a wheel and axle?
An ___________ is a slanted surface or a slope.
Which of the following is not an example of inclined plane?
A ________ is made up of two inclined planes.
Which among these is an example of wedge?
Force is used to _______ the flour.
A nail with a spiralling thread on it is called _________.
A screw is a special form of an _________.
Screw is an inclined plane wrapped around a __________.
Screws are used to _______ the objects together.
The ability of a body to do work is called _________.
All living things need _______ to live.
Most of the energy we need to live and work comes from.
__________ is the main source of energy on the earth.
The energy released by the sun is called __________.
The energy of the sun is trapped by ________ to prepare food.
A _________ also uses solar energy to cook food.
A __________ uses the force of moving air to generate energy.
The energy used to generate electricity and draw underground water is called _________.
________ use the force of fast flowing water to generate electricity.
___________ can be used to run various machines.
_________ are the natural substances that store chemical energy within them.
When we burn the fuel ________ energy is released.
Coal, petrol, cooking gas, _________ and ________ are different types of fuels.
The interior of the earth is very _________.
The earth also is a source of energy called _________.
__________ is the smallest particle of the matter.
The splitting of the atom releases _________ energy.
Atomic energy is used for making ___________.
Energy is present in different forms of mechanical, electrical, chemical, heat, sound and __________.
Energy can neither be created nor be __________.
Energy changes from one ________ to another.
An electric bulb converts electrical energy into _________.
While driving a vehicle the chemical energy of the fuel converts into ___________.
Which of the following activities does not use force?
In which of the following activities work is done?
Which simple machine is used to draw water from wells?
