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Understanding Forces and Motion in Physics

Learn about distance-time and velocity-time graphs, resultant forces, terminal velocity, and stopping distances in physics. Explore how forces impact an object's motion and how to calculate resultant force. Understand the concept of terminal velocity and factors affecting stopping distances.

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Understanding Forces and Motion in Physics

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  1. Force and motion Revise the following: • Distance time graphs • Velocity-time graphs • Resultant force • Terminal velocity • Stopping distances

  2. Distance time graph

  3. Distance time graph

  4. Distance time graph

  5. Velocity-time graph

  6. Velocity-time graph

  7. Velocity-time graph

  8. Velocity-time graph

  9. Distance-time graph Velocity-time graph

  10. Resultant forces There are usually several different forces acting on an object. The overall motion of the object will depend on the size and direction of all the forces. The motion of the object will depend on the resultant force. This is calculated by adding all the forces together, taking their direction into account. 50N 30N Resultant force on the crate = 50N – 30N = 20N to the left

  11. Resultant force Resultant force = mass x acceleration newton (N) kilogram (kg) metre/second2 (m/s2)

  12. Terminal velocity • The faster a body moves through fluid, the greater the frictional force which acts on it. • A body falling through a fluid will initially accelerate due to the force of gravity. • Eventually the resultant force on the body will be zero and it will fall at its Terminal velocity

  13. Stopping distance

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