Terminologies in Lever

Q.

The force applied on a simple machine to do work is called (effort/ load).

Q. The plank of a seesaw is $8\text{m}$ long and is supported at the centre. Neil, who weighs $80\text{kgf}$ sits at a distance of $3\text{m}$ from the fulcrum. John sits $4\text{m}$ from the fulcrum to balance the plank. What is John's weight?

1. 60

Q.

The fixed point about which a lever can turn is the ________.

Q. Why should the lower block of this pulley system be of negligible weight?

Q.

Schematic diagrams with variable positions of Fulcrum, Load and effort for the levers of class I are shown below.

Their MA values, respectively, will be

1. M.A. = 1 , M.A > 1 and M.A < 1

2. M.A. = 1 , M.A < 1 and M.A < 1

3. M.A. = 1 , M.A < 1 and M.A >1

4. M.A. = 1 , M.A > 1 and M.A > 1

Q. A lever is a simple machine that is free to move about a point called:

1. Effort
2. Fulcrum
3. Load
4. Wheel

Q.

The figure shows an inclined plane.

What is needed the effort to push the load of 240N from A to B if efficiency is 80%?

1. 24N

2. 250N

3. 240N

4. 2kN

Q. The effort and load arms of a lever are 1 m and 0.5 m respectively. If efficiency = 50%, V.R. =

1. 1
2. 0.5
3. 0.25
4. 2

Q. The fixed point about which a lever turns is called:

1. Effort
2. Fulcrum
3. Pulley
4. Load

Q.

Which letters represent the Load, Effort, and Fulcrum for the given lever diagram?

1. Fulcrum = B; Effort = C; Load = A

2. Fulcrum = A; Effort = B; Load = C

3. Fulcrum = C; Effort = A; Load = B

4. Fulcrum = B; Effort = A; Load = C

Q.

Which letters represent the Load, Effort, and Fulcrum for the given lever diagram?

1. Fulcrum = A; Effort = B; Load = C

2. Fulcrum = B; Effort = C; Load = A

3. Fulcrum = C; Effort = A; Load = B

4. Fulcrum = B; Effort = A; Load = C