Monday, November 21, 2022. Day 1

Do Now:

  1. Copy the Force-Body diagram of the object below.

  2. Determine the net force acting on the body.

  3. Calculate the acceleration of the body.

Homework to be Completed:

Finds, collect and bring in:

  • 1 soda bottle

    • 2 liter or 1 liter - no small

  • 2 or 3 Styrofoam meat trays

Todays Agenda:

Review Do Now

Finish and Review Cash Crash

Class Notes: Newton’s Third Law - action and reaction

Newton’s Third Law

  1. When one object exterts a force on a second object, the second object exerts and equal force on the first object in the opposite direction.

    • for every action there is an equal but opposite reaction.

    • action - the initial force

    • reaction - the equal but opposite push back

    • act on different objects (sketch)

  2. because action and reaction act on different objects - they sometimes behave very differently.

    • Examples:

      • ball bounce

      • standing on floor

  3. action and reaction make a force pair.

    • Forces always occur in pairs.

    • normal force is a reaction force to pushing against a surface

Physics For Fun - Gravity

Physics For Fun - 1st Law

Physics For Fun - 3rd Law