• What forces are imposed to a box staying at rest over ground?
  What’s the net force acting on the box?
  Which law of Newton best explains this phenomenon?
• Two forces are applied to pull a cart on a frictionless surface. One force is F₁=30 N, and the other is F₂=20 N. The cart has a mass of 5 kg.
  1) What will be the maximum net force that could be experienced by the cart? What’s its acceleration in this case?
  2) What will be the minimum net force that could be experienced by the cart? What’s its acceleration in this case?
• Using g=10 m/s²,
  1) Find the weight of a person whose mass is 100kg.
  2) Find the mass of a car whose weight is 8000 N.
• A feather has a mass of 0.05 kg. It falls to ground while experiencing air resistance of 0.3 N. What’s the actual acceleration of the feather?
• A 3.0 kg block being pulled across a table by a horizontal force of 80 N also experiences a frictional force of 5 N. What’s the acceleration of the block?
• Give three examples of action and reaction force.
• What’s the difference between mass and weight?

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