Gerak Lurus 2
3 min read
4 months ago
Published on Sep 01, 2024
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Table of Contents
Introduction
This tutorial covers the principles of vertical motion, specifically focusing on upward and downward linear motion, as well as free fall. Understanding these concepts is essential for students studying physics, as they form the foundation for more complex topics in mechanics.
Step 1: Understanding Vertical Motion Upwards
- Definition: Vertical motion upwards occurs when an object moves against the force of gravity.
- Key Concepts:
- Initial Velocity: The speed at which the object starts moving upwards. This can be calculated or given.
- Acceleration due to Gravity: Always acts downward at approximately 9.81 m/s².
- Practical Advice:
- When calculating the maximum height reached by an object, use the formula:
[
v^2 = u^2 - 2gh
]
Where:
- ( v ) is the final velocity (0 m/s at the peak)
- ( u ) is the initial velocity
- ( g ) is the acceleration due to gravity
- ( h ) is the height reached
- When calculating the maximum height reached by an object, use the formula:
[
v^2 = u^2 - 2gh
]
Where:
Step 2: Understanding Vertical Motion Downwards
- Definition: Vertical motion downwards occurs when an object moves towards the earth under the influence of gravity.
- Key Concepts:
- Free Fall: An object in free fall experiences no resistance other than gravity.
- Acceleration: The object accelerates downwards at 9.81 m/s².
- Practical Advice:
- To calculate the time taken for an object to hit the ground when dropped from a height, use:
[
t = \sqrt{\frac{2h}{g}}
]
Where:
- ( t ) is the time in seconds
- ( h ) is the height from which it is dropped
- To calculate the time taken for an object to hit the ground when dropped from a height, use:
[
t = \sqrt{\frac{2h}{g}}
]
Where:
Step 3: Exploring Free Fall
- Definition: Free fall refers to any motion of a body where gravity is the only force acting upon it.
- Important Points:
- All objects in free fall, regardless of mass, fall at the same rate in a vacuum.
- Air resistance can affect the motion of objects in free fall; this is negligible in ideal conditions.
- Practical Application:
- To demonstrate free fall, drop two objects of different masses from the same height and observe that they hit the ground simultaneously (in a vacuum).
Conclusion
In this tutorial, we explored vertical motion both upwards and downwards, along with the concept of free fall. We covered key formulas and practical applications that help in understanding these concepts. For further study, consider exploring the effects of air resistance on falling objects or conducting experiments to observe these principles in action.