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Success Criteria:
I am able to understand that force is a push or pull on an object, and can be contact or non-contact.
I am able to understand and articulate Newton's First Law of Motion, also known as the Law of Inertia.
I am able to define inertia and explain how it relates to an object’s resistance to changes in its motion.
I am able to provide and discuss examples demonstrating inertia from real-life scenarios.
Fun Fact
Inertia is the reason why you feel a jolt when a car suddenly accelerates or brakes. When the car speeds up or slows down, your body tends to stay in its original state of motion due to inertia. So, if the car accelerates quickly, you feel pushed back into your seat, and if it brakes suddenly, you feel thrown forward. It's all about your body's resistance to changes in motion!
Key terms
Contact force is a force that acts on an object through direct physical interaction with another object or surface, such as applied forces, tension forces, friction and spring forces.
Non-contact force is a force that acts on an object without physical contact, through fields such as gravitational, electromagnetic, or nuclear forces.
Newton (N) is the SI unit for measuring force. 1 Newton of force is roughly equal to holding a 100g object against gravity.
Inertia is the property of an object to resist changes in its state of motion, whether it's at rest or moving. It means that an object will remain stationary or continue moving in a straight line at constant speed unless acted upon by an external force.
Learning Tasks
Chapter 12.1 questions p.362
Find 3 examples of inertia in everyday life
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