Machine
Trending Questions
Define load and effort.
What are the advantages of using simple machine?
Why is a machine not 100% efficient?
What is the use of input unit
What do you understand by an ideal machine ? How does it differ from a pratical machine ?
State four ways in which machines are useful to us.
(a) What do you understand by a simple machine ?
(b) State the principle of an ideal machine.
What is the relation between load and the effort while calculating the reciprocal of Mechanical Advantage?.
LoadEffort
EffortLoad
Effort + LoadLoad
EffortEffort + Load
A lever can act as a force multiplier and speed multiplier simultaneously.
True
False
A certain machine is very efficient.
What does this mean?
- It produces a large amount of power.
It uses very little energy.
It wastes very little energy.
It works very quickly.
What is the single movable pulley ? What is its mechanical advantage in the ideal case ?
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1743438/original_cracker.png)
Give four reasons for using machines.
Identify A Company That Offers Of-enabled Controllers.
A single fixed pulley makes the task easier by changing the direction of the effort.
- True
- False
Why do you need less effort to drive in a screw through a piece of wood rather than to hammer in a nail?
Name the simple machine used for cutting cloth.
- Moving parts are not frictionless.
- String is not perfectly elastic.
- Different parts are not perfectly rigid.
- All the input work is converted to output work.
- True
- False
A class I lever acts as a force multiplier.
- True
- False
- Single fixed pulley
- Wheel
- Wedge
- Single movable Pulley
In a simple machine, if the effort arm is doubled and the load arm is halved, then how does the velocity ratio (VR) change?
Becomes half of the initial value.
Remains the same.
Becomes 2 times the initial value.
Becomes 4 times the initial value.
In which of the following ways does the machine help us?
Both A and C
Loss in speed.
In lifting heavy load by using less effort.
Changing the direction of effort.
"An ideal machine cannot be made practically." Justify the statement.
List the daily life situations where you use simple machines.
Place: In Kitchen
Situation:
Simple Machine:
- 0
- > load
- < load
- = load
What is a simple machine?
In a gear system, the gear ratio of the driving wheel A and driven wheel B is 10: 1. To rotate the driven wheel B in the direction of driving wheel A, the driving wheel A is engaged with another wheel C. What should be the gear ratio of the wheels A and C?
1: 10
1: 1
1: 2
2: 1
Where Is PERT Used?