Question

wiciency
C. Statements given below are incorrect. Write
the correct statements.
1. The resistance overcome by a machine is
called friction
2. A machine which lifts more load than effort
applied has efficiency more than 1.
3. An ideal machine is possible in real life.
4. The force applied on a machine to do some
mechanical work is called pressure.
5. The ratio between input energy and output
energy is called efficiency of machine
D. Tick (7) the most appropriate answer.
1. Which of the following do not belong to the
same class?
(a) Lever
(b) Pulley
(c) Inclined plane (d) Wheel and axle
2. Which of the following do not belong to the
same class?
(a) inclined plane (b) wedge
(c) pulley
(d) screw
​

Answer 1

Answer:

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

2. A machine which lifts more load than effort applied has efficiency more than 75.

3. An ideal machine is not possible in real life.

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

5. statement is correct that the ratio between input and output energy is called eficiency of machine.

D.

1. wheel and Axel

2.screw

Explanation:

I hope its help a lot.