The First Law of Motion is also known as the Law of Inertia.
Who formulated the First Law of Motion?
Sir Isaac Newton formulated the First Law of Motion.
What does the Law of Inertia state about an object at rest?
The Law of Inertia states that an object at rest will stay at rest unless acted upon by an external force.
What does the Law of Inertia state about an object in motion?
The Law of Inertia states that an object in motion will continue moving at the same speed and in the same direction unless acted upon by an external force.
How does mass affect an object’s inertia?
An object with greater mass has more inertia, meaning it requires more force to change its state of motion.
Give an example that demonstrates the Law of Inertia.
A car suddenly stopping and the passengers lurching forward demonstrates the Law of Inertia; their bodies want to keep moving at the same speed due to inertia.
Why are seatbelts important in cars according to the Law of Inertia?
Seatbelts are important because they provide the external force needed to change the motion of passengers, keeping them from continuing in motion during sudden stops.
What happens to an object moving through space if no external forces act on it?
It will continue moving at the same speed and in the same direction indefinitely due to inertia.
How does friction relate to the Law of Inertia?
Friction is an external force that opposes motion and can change the state of motion of an object, demonstrating the need for a force to alter motion.
Why does a soccer ball eventually stop rolling on the ground?
The ball stops due to external forces like friction and air resistance acting on it.
What role does inertia play in a car taking a sharp turn?
Inertia causes passengers to feel a force pushing them outward as their bodies want to continue in a straight line.
Can inertia be directly measured?
No, inertia itself cannot be measured directly, but it is inferred from mass and the object's resistance to changes in motion.
Why is it harder to push a loaded cart compared to an empty one?
A loaded cart has more mass, which means it has more inertia, requiring more force to change its motion.
What would happen to a hockey puck on a perfectly frictionless ice surface?
The puck would glide indefinitely without stopping or changing direction unless acted upon by an external force.
How does the concept of inertia apply to crash testing in cars?
Crash tests simulate collisions to test how well a car can minimize the effects of inertia, protecting passengers from abrupt motion changes.