大象传媒

  • Forces

    • Scalar and vector quantities - AQA

      Scientists often make measurements. The physical quantities they measure fall into two categories: scalars and vectors. Scalar and vector quantities are treated differently in calculations.

    • Contact and non-contact forces - AQA

      Forces are responsible for all the interactions between particles and objects. They can be divided into two categories: contact forces and non-contact forces.

    • Gravity - AQA

      Gravity is one of the most important forces in the universe. An object with mass in a gravitational field experiences a force known as weight.

    • Forces and elasticity - AQA

      Forces are responsible for changing the motion of objects. If more than one force is present, the shape of an object can also be changed.

    • Moments, levers and gears - AQA

      Turning forces are found in many everyday situations and are essential for machines to function. Levers and gears make use of these turning forces to provide an advantage.

    • Pressure in fluids - AQA

      Every living thing on Earth is in balance with the pressure of the air or water around it. Pressure helps blood to move around the body and allows organisms to breathe.

    • Describing motion - AQA

      The movement of objects can be described using motion graphs and numerical values. These are both used to help in the design of faster and more efficient vehicles.

    • Forces, acceleration and Newton's Laws - AQA

      Falling objects eventually reach terminal velocity - where their resultant force is zero. Stopping distances depend on speed, mass, road surface and reaction time.

    • Momentum - Higher - AQA

      Momentum can be thought of as a combination of mass and velocity. Momentum helps explain some of the most important interactions in nature.

    • Sample exam questions - forces - AQA

      Understanding how to approach exam questions helps boost exam performance. Questions will include multiple choice, descriptions and explanations, using mathematical skills and extended writing.

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