Lesson Notes By Weeks and Term v4 - JHS 1

Lesson Video

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Performance objectives

• Explain the concept of inertia.
• Describe unbalanced forces and their effects.
• Demonstrate how unbalanced forces cause changes in motion.
• Apply these concepts to real-life situations in Ghana.

Lesson summary

In daily life in Ghana, we see motion everywhere: a trotro starting from a station, a football being kicked, a wheelbarrow being pushed at the market, or a bicycle slowing down on a rough road. All these happen because of forces. Sometimes forces are balanced (no change in motion), and sometimes they are unbalanced (they cause a change in motion). Understanding unbalanced forces helps learners explain road safety (seat belts), sports performance, and how machines and tools work.

Lesson notes

2.1 Meaning of Force A force is a push or pull that can: start motion, stop motion, change speed (speed up or slow down), change direction, change shape (e.g., squeezing a sponge).

Unit of force: newton (N)

Examples in Ghanaian context Pushing a desk in class. Pulling a bucket from a well. Kicking a football. Braking a bicycle.

2.2 Inertia (Key Exemplar) Inertia is the tendency of a body to resist any change in its state of rest or motion.

Evaluation guide

• Explain inertia as a tendency of a body to resist motion. Digital Literacy (DL), Communication and
• Collaboration (CC)
• CC 8.2: Explain ideas in a clear order with
• relevant detail, using correct construction and