## Chapter 4: The Laws of Motion

 Describe Newton's Laws and their applications to motion. Given F=ma, calculate the motion of an object If a 5 kg object is acted upon by a force of 20 N, what is its acceleration? If it starts from rest, what will be its speed after 3 seconds? What is the difference between mass and weight? If and object has a mass of 2 kg, what is its weight under normal Earth gravity? If a crate weighs 120 pounds, what is its mass? Describe static and kinetic friction and their applications If the coefficient of static friction of a surface is 0.5 and the coefficient of kinetic friction is 0.4, then how much force will be required to set in motion a 40 kg crate? How much force will be required to keep it going at a constant velocity a after starting? If a large truck and a Volkswagen collide, which is acted upon by the larger force? If more than one force acts on an object, how do you predict its motion from Newton's second law? If a 10 kg object falls in the Earth's gravity but is acted upon by a 40 N air resistance force, what will be its acceleration? What is meant by "terminal velocity" in free fall? If air drag is proportional to the square of the velocity, how do you calculate the terminal velocity? Does the larger Earth exert a larger gravitational force on the smaller Moon than it exerts on the Earth? *Motion concepts *Newton's laws *F=ma *Mass and weight *Elevator problem *Application of F=ma *Motion calculation *Standard problems *Weight calculation *Friction *Force to overcome friction *Newton's 3rd law *Combinations of forces *Quadratic air drag *Terminal velocity examples *Terminal velocity calculation *Fundamental forces
Index
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## Chapter 7: Circular Motion

 If an object is traveling in a circle at constant speed, is it accelerated? What is centripetal acceleration? How is it calculated? What is centrifugal force? When is it appropriate to use that term? What is coriolis force? Does motion in a circle at a constant speed involve an acceleration? What causes the tides? Why are there two per day instead of just one? What is the difference between centrifugal force and centripetal force? Which can you measure with a scale? How does the force of gravity change with distance? If an object weighs 600 N at the Earth's surface, what will it weigh twice as far out from the Earth's center? ...three times as far out? *Circular motion *Centripetal acceleration *Vector velocities *Centripetal force calculation *Centrifugal force *Coriolis force *Inverse square law *Tides *Sun tide *Jupiter effect *Gravity in orbit *Circular orbit *Syncom satellites
Index
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