Class II Lever

Q.

What is the basic difference between SI system of units and MKS system of units?

Q.

Name six simple machines. Give an example of each machine

Q.

How do you calculate the effort force of a pulley?

Q.

What type of machine we use to open the lid of a bottle?

1. Wedge

2. Pulley

3. Second order lever

4. First order lever

Q.

Give one example each of a class I lever where mechanical advantage is (a) more than 1, and (b) less than 1.

Q.

A paper cutter is an example of class II lever.

1. False

2. True

Q.

Sewing machine is an example of a simple machine.

1. True
2. False

Q.

Forceps is an example of _____ order lever.

1. 1

2. 2

3. 3

4. 1 or 2

Q. Which of the following is an example of lever?

1. 

2. 

3. 

4. 

Q. State the CGS, MKS, FPS and SI systems of units of the physical quantities length, mass and time.

Q.

A nail remover is an example of ___ order lever.

Q. For a speed multiplier, mechanical advantage is one.

1. greater than
2. less than
3. equal to

Q. Fill in the blanks:​

A moving football when kicked, its _______ changes.​

Q.

A bottle opener is an example of second-order lever.

1. True
2. False

Q.

A hand grinder is an example of a pulley.

1. True
2. False

Q.

In the case of the lever of the third order, the effort arm is always longer than the load arm.

1. True
2. False

Q. How to change cm of hg into atm or bar

Q. Which force(s) is/are involved in arm-wrestling?​

1. Tension
2. Friction
3. Muscular
4. Reaction

Q.

The lever rotates about the ___ .

Q.

Name the type of force which is responsible for the change in position or state of the object.

Q.

Force multiplier is a situation in a machine when

1. less effort is required to move a heavy load

2. the effort applied is equal to the load

3. None of these

4. more effort is required to move a heavy load

Q.

In a machine, an effort of $10kgf$ is applied to lift a load of$100Kgf$. What is the mechanical advantage of the machine?

Q. Name the type of force which acts in the following case:
A man rows a boat.

Q.

Answer the following question in one word each

What do we call the tools and devices that reduce our effort and make our work easier?

Q.

Differentiate between the class-two lever and class-three lever.

Q.

In the case of a single fixed pulley, state whether the load moves in the direction of effort or opposite to effort?

Q. Sugar tongs is an example for .

1. time multiplier
2. speed multiplier
3. force multiplier

Q.

In a class II lever, ______ comes between the effort and the fulcrum.

1. load

2. force

3. Energy

4. axle

Q. Select the statements that hold true for a Class II lever.

1. Mechanical advantage > 1
2. Mechanical advantage < 1
3. A wheelbarrow is a class II lever.
4. Also called an effort multiplier

Q.

What is a lever? Draw a lever of class-two type.