Types of Lever

Q.

Relation between SI unit and CGS unit of force

1. 1 N = 10⁵ dyne

2. 1 dyne =9.8N

3. 1 dyne = 10⁵N

4. 1 N =10^-5 dyne

Q. Scissors belong to what class of levers?

1. Class I
2. Class II
3. Class III
4. (b) and (c) above.

Q. The mechanical advantage of class III levers is always.

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

Q. The position x of a particle moving along the x-axis at time t is t=root of x +2. find the work done by the force in first 4 sec.??

Q.

Classify the following into levers as class I, class II or Class III :

(a) a door (b) a catapult

(c) a wheel barrow (d) a fishing rod.

Q.

Name the three classes of levers and state how are they distinguished. Give two examples of each class.

Q. What kind of lever is a soda bottle opener?

1. Class I
2. Class III
3. (a) and (b) above.
4. Class II

Q.

Choose the odd one out. Give reasons for your choice.

Nutcracker, wheelbarrow, bottle-opener and a pair of pliers

Q.

In the figure below shows a lever in use.

(a) To which class of lever does it belong?

(b) If AB = 1m, AF = 0.4 m, find its mechanical advantage.

(c) Calculate the value of E.

Q.

Write an expression for the mechanical advantage of a lever.

Q. Choose the lever that acts as a speed multiplier.

1. Scissors
2. Broom stick
3. Wheelbarrow
4. Nutcracker

Q.

Fulcrum (F), load (L), and effort (E) of a simple machine lies in a line. Among the given options which arrangement is correct for class II lever.

1. LEF

2. ELF

3. FLE

4. LFE

Q.

For class 1 lever, which of the following statement is true?

1. The effort is in between load and fulcrum.

2. The effort is between load and fulcrum.

3. The load is in between effort and fulcrum.

4. Fulcrum always lies between load and effort.

Q. Which of the following is an example of force multiplier in class $\text{I}$ levers?

Q.

Define the three kinds of lever.

Q. A pair of pliers and a pair of scissors both are levers. Identify which is a speed multiplier in them.

Q.

The mechanical advantage (MA) of an ideal inclined plane is always

1. equal to one

2. greater than zero but less than 1

3. zero

4. greater than 1

Q.

Which criterion is being used to classify the three types of lever?

1. Relative positions of the effort, load and fulcrum

2. Efficiency

3. Velocity Ratio

4. Mechanical advantage

Q.

For class 1 lever, which of the following statement is true?

1. The load is in between effort and fulcrum.

2. Fulcrum always lies between load and effort.

3. The effort is in between load and fulcrum.

4. The effort is between load and fulcrum.

Q. Identify the lever that acts as a force multiplier.

1. Tongs
2. Wheelbarrow
3. Broom stick
4. Short handle oar

Q.

The force required to open a nut using a spanner of length 90 cm is 50 N. Calculate the force required if the spanner is 50 cm long.

1. 30 N

2. 60 N

3. 45 N

4. 75 N

5. 90 N

Q. The effort arm is equal to the load arm in a:

1. Nutcracker
2. Broom stick
3. Beam balance
4. Hinged oar

Q. Class III levers with M.A. < 1, are:

1. Force multipliers
2. Speed multipliers
3. Time multipliers
4. Easy to handle

Q.

A nail cutter is an example of

1. First-order lever

2. Second-order lever

3. Third-order lever

4. A complicated lever

Q.

What type of a lever is the scissor?

1. First order

2. Second order

3. Third order

4. Fourth order

Q. For class I levers, the mechanical advantage and velocity ratio can have average value either

1. Greater than $1$
2. Smaller than $1$
3. Equal to $1$
4. All

Q. The diagram shows a lever in use.
To which class of levers does it belong?

Q. A screwdriver can be used to open a can of paint. In this situation, the screwdriver is being used as a

1. wheel and axle
2. inclined plane.
3. lever
4. screw

Q. In class III levers, the load lies in between the effort and the fulcrum.

1. True
2. False

Q. Which class of lever has the load located between the effort and the fulcrum?

1. Class I
2. Class III
3. Class II
4. None of the above