5 Questions
The first law of motion states that when an unbalanced external force acts on an object, what happens to the object's motion?
The object will either start moving, stop moving, or change its direction.
In Activity 8.2, why does the coin fall vertically into the glass tumbler when the card is flicked?
The coin falls vertically due to its inertia, which tries to maintain its state of rest even when the card is flicked away.
In Activity 8.3, why does the water spill when the tray is turned around quickly?
The water spills due to its inertia, which resists changes in its state of motion and causes it to move in the direction of the tray's rotation.
Why is a groove provided in a saucer for placing a tea cup?
The groove prevents the tea cup from toppling over in case of sudden jerks by providing stability and resistance to changes in its state of motion.
What do all the examples and activities given in the text illustrate?
They illustrate the concept of inertia and how it relates to the resistance offered by objects to changes in their state of motion.
Quiz: Understanding the First Law of Motion Test your knowledge on the first law of motion with this quiz. Learn about the concept of unbalanced external force and its effects on objects. Challenge yourself with scenarios involving a coin, a stiff card, and a glass tumbler. Discover how the law explains the motion of the coin when the card is flicked horizontally.
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