Which of the following is an example of a lever?
A crowbar used to lift a heavy object
Step-by-step Explanation:
-
Understanding the Concept of Levers: A lever is a simple machine that amplifies an input force to provide a greater output force. It consists of a beam or rigid rod pivoted at a fixed hinge, or fulcrum.
-
Identifying the Options:
- A hydraulic jack used for lifting heavy vehicles
- A crowbar used to lift a heavy object
- A pulley with a rope
- A screw holding two boards together
-
Analyzing Each Option:
- Hydraulic Jack: This is not a lever. It uses hydraulic fluid pressure to lift heavy objects.
- Crowbar: This is an example of a lever. When used to lift heavy objects, it acts as a lever with the fulcrum at the point of contact with the ground.
- Pulley: This is another type of simple machine, but it is not a lever. A pulley helps change the direction of a force applied to lift objects.
- Screw: This is also a simple machine but not a lever. Screws convert rotational force to linear force.
-
Conclusion: The correct answer is a crowbar used to lift a heavy object, as it functions as a lever by helping lift objects with mechanical advantage.
Similar Questions
A series of processes to joint various parts to get a complete product is known as _____
The fixing of different parts of a machine properly as per the requirement is called _____.
What does the term 'centre of gravity' refer to in workshop calculations and science?
Important Questions from Basic Concepts
The friction force exerted by air on a moving body is called ----
A series of processes to joint various parts to get a complete product is known as _____
The fixing of different parts of a machine properly as per the requirement is called _____.
Arrange the following lamps based on the increasing power rating and energy consumption to provide the same level of Illumination or lighting
A. Incandescent Lamp with efficacy of 10 lumens/watt
B. Compact fluorescent lamp (CFL) with efficacy of 60 lumens/watt
C. Halogen lamp with efficacy of 20 lumens/watt
D. Mercury vapour lamp with efficacy of 40 lumens/watt
E. Light Emitting diode (LED) lamp with efficacy of 80 lumens/watt
Choose the correct answer from the options given below:
- The device in machine which feeds thread in sufficient quantity and tightens loop is :
