Full Test Bank – Physics, 12th Edition by Cutnell & Johnson, Chapters 1–32

Full Test Bank – Physics, 12th Edition by Cutnell & Johnson, Chapters 1–32 in elastic collision, momentum and kinetic energy are (conserved/not conserved) conserved in inelastic collision, momentum and kinetic energy are (conserved/not conserved) energy is not conserved momentum is conserved momentum is ____ in all collision conserved if the object sticks together after collision it is called ___ center of mass formula perfectly inelastic collision Xcm = (m1x1 + m2x2...)/(m1 + m2...) center of mass formula of a continuous object 1/M ∫ r dm Kinetic (M = total mass of the object, r = position vector of a tiny piece of mass, dm = tiny bit of mass) rocket with variable mass formula vf - vi = ve ln(Mi/Mf) (it describes how a rocket's v changes as it loses its mass by expelling its fuel or parts) (ve = exhaust velocity = speed of gas leaving rocket relative to roket) the thrust of the rocket is determined from the ____ conservation of momentum Resultant force is equal to ___ in circular motion Kinetic energy is maximized when work ____ zero the centripetal force when work stops increasing, i.e when its how to calculate x and y component of work Wtotal = Wx + Wy (NOT sqrt(x^2 +y^2)) average Force formula Favg = Δp/Δt = m(vf - vi)/Δt Work relationship formula to potential energy velocity of center of mass formula W = -ΔU m1v1+m2v2+m3v3.. / m1+m2+m3... Lsin(x) given the length of a string, the radius of a horizontal circular motion with the string at an angle is.. can you use angular formulas for circular motions no on a banked curve, friction acts ___ when you go too fast down the bank (because you will slip upward if you go too fast without friction, so it points down to prevent that motion) on a banked curve, friction acts ___ when you go too slow up the bank (because you will slip downward if you go too slow without friction, so it points up to prevent that motion) The direction of the centripetal force always points ___ and continually changes direction as the object moves Circular motion: banked curve what's the centripetal force What force equals to mg/Fg Fc = Fnsinθ Circular motion: banked curve What force equals to mg/Fg Fg = Fncosθ Circular motion: banked curve towards the center of the circle What's the formula to find ideal angle so car can go around a curve without friction v^2/rg (r = radius of circular path) Tangential and Radial acceleration relationship centripetal a points towards the center tangential a points along direction of motion vertical and horizontal circular motion forces what is acceleration at terminal speed Motion with resistive force R=-bv uniform circular motion they are perpendicular zero tanθ = acceleration points towards the center, and net force has to be also in the same direction non uniform circular motion normal force is different at different part of the circle (vertical circular motion) Work is a (scalar/vector) scalar, it has no direction, magnitude only What does the are under force and distance graph equate to Work Gravitation force is a (conservative/nonconservative) force frictional force is a (conservative/nonconservative) force fk = nonconservative force Hooke's Law formula F = -kx Fg = conservative force mechanical energy (is/is not) conserved when there's friction not conserved when work is done by friction, it increases the ___ energy internal energy energy diagrams and equilibrium: stable equilibrium potential energy is at minimum for Ug, height is at lowest point for Us, x is 0 energy diagrams and equilibrium: unstable equilibrium potential energy is at a maximum for Ug, height is not lowest point/0 for Us, spring is compressed and x is not 0 energy diagrams and equilibrium: Neutral equilibrium occurs when potential energy is constant over some region every conservative force has a ____ energy associated with it potential energy mechanical energy is (conserved/not conserved) in an isolated system ΔK + ΔU = 0 conserved mechanical energy is (conserved/not conserved) in an non-isolated system not conserved ΔK + ΔU = -fkd + (other force) Impulse formula I = Δp = F*Δt