Subject: Science
Simple machines are those in which effort is applied at a more convenient point in a more convenient direction. This note contains information about various types of simple machine with its example, principal of simple machine.
We use different kinds of machines and tools in our daily life. Simple machines are those instruments in which effort is applied at a more convenient point in a more convenient direction. The work done on a machine is called input and the work done by the machine is called output. Input is the product of force and distance through which force is applied and output is the product of load and distance through which load is moved. A simple machine is a device, which makes our work easier by
All machines work on the principle that when the effort is smaller than the load, it has to move a greater distance than the load in order to lift it up. There are six types of simple machines, they are:
The principle of machine is Input work = Output work
Or, E x E. d = L x L. d
Where, E = Effort
E. d = Effort distance
L = load
L. d = load distance
A simple machine is a device, which makes our work easier by
Types of simple machines are:
The principal of machine is Input work = Output work
How does a simple machine make the work easier and faster?
A simple machine makes the work easier and faster by:
What is a machine?
A machine is a device when force is applied to it, it makes our work easier, changes the direction of force and enhance the speed of the work.
Write the name of two types of simple machines.
The two types of simple machines are lever and Pulley.
How many types of simple machines are there? What are they?
There are six types of simple machines, they are:
What is the principle of simple machine?
The principal of machine is
Input work = Output work
Or, E x E. d = L x L. d
Where, E = Effort
E. d = Effort distance
L = load
L. d = load distance
A crow-bar 2 m long is pivoted about a point 5 cm from its top. What is the smallest force which must be applied at the other end to displace a load of 100 N?
\begin{align*}\\ \text {effort} (E) = 100\: N \\ \text {load arm} (Ld) =195\: cm\\ \text {Effort arm} (Ed) = 5\:cm \\ \text {load} (l) = ?\: N \\ \text {we know} \\ \text {accoding to the principle of simple machine} \\ \text {load} \times \text {load arm} &= \text {effort} \times \text {effort distance} \\ \text {or,} \: E\times 195 &= 100 \times 5 \\ \therefore &= \frac {100 \times 5}{195} \\ &= 2.56\: N\\ \end{align*}
A uniform seesaw, 5 m long, is suppoted at centre. A girl weiging 50 kg sits at a distance of 1 m from the centre of the seesaw. Find where a boy of weight 20 kg must sit on the other side of seesaw so as to balance the weight of the girl. To which class lever it belongs?
Seesaw has the fulcrum F at the centre and thus forms the lever of first class. Let the boy st at a distance X metre from the centre.
\begin{align*} \text {effort} (E) = 50\: kg \\ \text {load arm} (Ld) =1\: m \\ \text {load } (l) = 20 \: kg \\ \text {Effort arm} (Ed) = X\:m \\ \text {we know} \\ \text {accoding to the principle of simple machine} \\ \text {load} \times \text {load arm} &= \text {effort} \times \text {effort distance} \\ \text {or,} \: 50\times 1 &= 20 \times X \\ \therefore X = \frac {50}{20} \\ &= 2.5 m \\ \end{align*}
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