physics modify 2 problem values Sem I Jeopardy About Science/ Lab Reports 1. It is called the most basic science physics 2. What is done to a theory to accommodate a new fact modify 3. # of significant digits in 12.571 X 3.1 answer 2 problem 4. First step in the scientific method values 5. The “V” in VFSA

speed acceleration velocity 110 mi/hr Motion 1. Distance divided by time speed 2. Constant quantity for a free falling object acceleration 3. Speed and direction velocity 4. Relative speed between 50 mi/hr northbound and 60 mi/hr southbound cars 110 mi/hr 5. Instantaneous speed at top of vertical toss

Nt 3rd L inertia 2N opposite acceleration Newton’s Laws 1. Pushing on something pushes back on you Nt 3rd L 2. Resistance to a change of motion inertia 3. Force that would accelerate a 2 kg object 1 m/s2 2N 4. Direction of friction force compared to original force opposite 5. Produced by a net force acceleration

5N resolution 25 N mag dir Vectors 1. Tension in 2 vertical ropes supporting 10 N 5N 2. Resultant force on an object in equilibrium 3. Technique of finding components of vectors resolution 4. Max resultant of 5 N and 20 N vectors 25 N 5. 2 parts of a vector quantity mag dir

Momentum 1. Mass times velocity momentum 2. Force times change in time impulse 3. Impulse = change in this momentum 4. 100 Ns impulse changes velocity of 5 kg object by _ 20 m/s 5. States: momentum before = momentum after Law of Conservation of momentum

work ½ mv2 15,000 J Watt 5 W Energy 1. Force times distance 2. Formula for KE ½ mv2 3. KE of 300 kg object moving 10. m/s 15,000 J 4. Unit of power Watt 5. Power required to do 50 J of work in 10 s 5 W

stable equil unstable neutral cg in Earth Center of Gravity 1. Displacement causes rising cg stable equil 2. Displacement causes lowering cg unstable 3. Displacement causes no change in cg neutral 4. Object topples when this extends beyond base cg 5. Location of cg of earth-moon system (in Earth, between, in Moon) in Earth

centripetal tangent centrifugal 4 N torque Circular Motion 1. Center seeking force centripetal 2. Motion of circularly moving object on a string when the string breaks tangent 3. Fictitious force due to inertia of circularly moving object centrifugal 4. Centripetal force on 2 kg in 2 m radius moving at 2 m/s 4 N 5. Force times radial arm torque

Cavendish Tot E gravity distance 2 N Gravitation 1. He measured the Univ Grav Constant Cavendish 2. Remains constant for satellite in elliptical orbit (PE, KE, Tot E) Tot E 3. Weakest force in nature gravity 4. Force of grav varies inversely with this distance 5. Weight of 9 N earth object on planet with 2X the mass and 3X the radius 2 N