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Q5. Toy Cars - Slope & Surface Friction:

Toy cars – An open-ended task requires students to relate the height of a toy car on a slope to the energy it will have at the bottom of a slope. They describe the forces acting on the toy car and explain its motion in terms of varying frictional forces on different surfaces.

CORE CONCEPTS:

Gravitational potential energy is the energy stored in an object as the result of its vertical position or height.

  1. The higher that an object (a toy car) is elevated (higher on a slope), the greater the gravitational potential energy. a doubling of the height will result in a doubling of the gravitational potential energy (the car will roll twice as far).
  2. The more mass that an object has (the heavier it is), the more inertia that an object has (the lazier it is), A more massive object (a heavier object) has a greater tendency to resist changes in its state of motion. When accelerated via gravity, inertia and mass always cancel each other out!

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