Load

Q.

The distance between fulcrum and the point where effort is applied is called the _________ arm.

Q. What should you do to reduce the amount of effort needed to lift something using a first class lever?

1. Move the fulcrum closer to the effort
2. Move the fulcrum to the middle of the lever
3. Move the fulcrum closer to the load
4. None of these

Q. An effort is the force applied to move or lift the load.

1. True
2. False

Q.

In the solution to this problem "A machine has a velocity ratio of 4. It is used to raise a load of 200N by 4m using an effort 20kgf. Find the work done on the machine. Take g = 10 m/s2​." effort is calculated as 200. Please explain how this was calculated & the formula for this. Also do explain the unit kgf of effort (what does f stand for).

Q.

What is the relationship between the mechanical advantage and the velocity ratio for the practical machine?

Q. A machine lifts a weight of 80 kgf with a 40 kgf effort. The M.A. of the machine is:

1. 2
2. 2.5
3. 3
4. 1.5

Q.

A push or pull that can move the load is ______

1. fulcrum

2. load

3. energy

4. effort

Q. By changing the direction of force, effort can not be reduced.

1. True
2. False

Q.

The resistive or opposing force to be overcome by a machine is called

1. Effort

2. Friction

3. Velocity

4. Load

Q.

what kind of a machine is a stapler

Q. If the efficiency of a machine is 40% and it does 120 J of work, the input work is:

1. 300 J
2. 500 J
3. 600 J
4. 800 J