All questions of Simple Machines for JAMB Exam

Explanation:

Reducing the distance over which the force is applied:
- An inclined plane is a sloping surface that allows objects to be moved from a lower to a higher position with less force.
- By using an inclined plane, the distance over which the force is applied is increased, allowing for a smaller force to be exerted over a longer distance.
- This makes it easier to move objects, as less force is required to overcome the gravitational force acting on the object.

Example:
- For example, when moving a heavy box up a ramp, the force required to push it up the ramp is less than the force required to lift it straight up.
- This is because the ramp increases the distance over which the force is applied, reducing the amount of force needed to move the object.

Conclusion:
- In conclusion, an inclined plane makes work easier by reducing the distance over which the force is applied, allowing for the use of less force to move objects from one point to another.

Door Hinge and Simple Machines
Simple machines are tools that make work easier by multiplying, redirecting, or changing the direction of a force. A door hinge is a common example of a simple machine used in everyday life. Let's explore why a door hinge is considered a simple machine.

Screw
A door hinge typically consists of two plates joined together by a pin. The pin allows the plates to rotate relative to each other, enabling the door to swing open and closed. The pin in a door hinge acts as a screw, which is a type of simple machine.

How Does a Screw Work in a Door Hinge?
- When the door is opened or closed, the screw-like pin in the hinge rotates, allowing the door to move smoothly without coming off its frame.
- The threads on the pin increase the mechanical advantage, making it easier to open and close the door by reducing the amount of force needed to do so.

Conclusion
In conclusion, a door hinge utilizes the screw as a simple machine to allow the door to pivot smoothly. By understanding the principles of simple machines, we can appreciate how everyday objects like doors incorporate these concepts to make our lives more convenient.