MATERI KINEMATIK kelas 11 bag 4 GERAK LURUS BERATURAN GLB K Merdeka

Summary

This lesson explains the concepts of straight motion, focusing on two types: uniform linear motion (GLB) and uniformly accelerated motion (GLBB). It differentiates between horizontal (x-axis) and vertical (y-axis) motion, using examples such as walking and throwing an object. The lesson introduces key formulas for calculating distance, speed, and time, emphasizing the importance of units and conversions. Through practical examples, students learn how to solve motion problems and understand how graphs represent uniform motion. A practice section encourages learners to apply these concepts for deeper understanding.

Takeaways

• 📏 Linear motion refers to the movement of an object along a straight path.
• 🚗 There are two types of linear motion: Uniform Linear Motion (GLB) and Uniformly Accelerated Linear Motion (GLBB).
• ⬅️ GLB refers to motion where the speed is constant, and the acceleration is zero.
• 🎯 In GLB, the velocity remains the same over time, and the acceleration is zero since there is no change in speed.
• 📊 The graph of velocity (V) versus time (T) in GLB is a straight line, showing constant speed.
• 📐 The equation for GLB is X = V * T, where X is distance, V is velocity, and T is time.
• 📏 GLBB, on the other hand, involves changing velocity, which can be horizontal (x-axis) or vertical (y-axis).
• 🕒 In GLBB, velocity can either increase or decrease over time, resulting in a curved graph for position (X) vs time (T).
• ✏️ Practical examples in the video include solving for distance and speed, using the formula X = V * T and converting units from km/h to m/s.
• 💡 The lesson encourages students to practice solving problems related to uniform motion by changing units and applying the correct formulas.

Q & A

What is the definition of linear motion (gerak lurus)?

Linear motion is the movement of an object along a straight path. It means the object's trajectory is a straight line.

What are the two types of linear motion?

The two types of linear motion are Uniform Linear Motion (Gerak Lurus Beraturan - GLB) and Accelerated Linear Motion (Gerak Lurus Berubah Beraturan - GLBB).

What is uniform linear motion (GLB) and its characteristics?

Uniform linear motion (GLB) occurs when an object moves with a constant speed. The key characteristics of GLB are constant velocity and zero acceleration.

What is accelerated linear motion (GLBB), and what are its types?

Accelerated linear motion (GLBB) involves a change in velocity over time, meaning the object is either speeding up or slowing down. There are two types: horizontal GLBB (movement along the x-axis) and vertical GLBB (movement along the y-axis).

How does the velocity-time (v-t) graph look in GLB?

In uniform linear motion (GLB), the velocity-time graph is a straight, horizontal line because the velocity remains constant.

How does the position-time (x-t) graph behave in GLB?

The position-time (x-t) graph in GLB has a straight slanted line, showing that the object covers equal distances over equal intervals of time.

What is the formula for distance in uniform linear motion?

The formula for distance (x) in uniform linear motion is x = v * t, where 'v' is velocity and 't' is the time taken.

How do you convert velocity from km/h to m/s?

To convert velocity from km/h to m/s, multiply the value by 1000 to convert kilometers to meters, then divide by 3600 to convert hours to seconds. For example, 54 km/h is equal to 15 m/s.

What is the acceleration in uniform linear motion (GLB)?

The acceleration in uniform linear motion (GLB) is zero because the velocity is constant and does not change over time.

How would you calculate distance if a car is moving at 15 m/s for 300 seconds?

Using the formula x = v * t, where v = 15 m/s and t = 300 seconds, the distance traveled is 4500 meters.