Question

Statements given below are incorrect. Write
the correct statements.
1. The resistance overcome by a machine iscalled friction._________
2. A machine which lifts more load than efforapplied has efficiency more than 1. _________
3. An ideal machine is possible in real life.____________
4. The force applied on a machine to do somemechanical work is called pressure.___________
5. The ratio between input energy and outputenergy is called efficiency of machine.__________​

Answer 1

1. The resistance overcome by a machine is called load.

2. A machine which lifts more load than effort applied has mechanical advantage more than 1.

3. An ideal machine is impossible in real life.

4. The force applied on a machine to do some work is called effort.

5. The ratio between output energy and input energy is called efficiency of machine.

Answer 2

ANSWER :

[1] The resistance overcome by a machine is called load.

• ❒ Load is the resistance that is overcome by a machine. It is a resistive or opposing force which is to be overcome by a machine.

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[2] A machine which lifts more load than effort applied has advantage more than 1.

• ❒ A machine has advantage more than 1 which lifts more load than effort applied.

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[3] An ideal machine is impossible in real life.

• ❒ A machine which gives 100 percent efficieny that is entire input energy is converted into output energy is called a ideal machine. But it is not possible in real life.

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[4] The force applied on a machine to do some mechanical work is called effort.

• ❒ Effort force is the force that is applied on a machine to do some mechanical work by the machine. By appling effort force in a machine, output work is received.

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[5] The ratio between output energy and input energy is called efficiency of machine.

• ❒ The efficiency of a machine is the ratio from output energy to input energy.