Recent content by leejqs

Homework Statement After falling from rest at a height of 29.8 m, a 0.422 kg ball rebounds upward, reaching a height of 21.7 m. If the contact between ball and ground lasted 1.83 ms, what average force was exerted on the ball? Homework Equations Change in momentum (p) = Fnet* Change in...

would time t = the distance d divided by the initial x velocity, or the the distance L divided by the initial x velocity?

Homework Statement In which of these situations is it reasonable to use the approximate formula for the momentum of an object, instead of the full relativistically correct formula? A car traveling on the interstate. A proton in outer space traveling at 2×108 m/s. A commercial jet...

Homework Statement In a cathode ray tube (CRT) used in older television sets and oscilloscopes, a beam of electrons is steered to different placed on a phosphor screen, which glows at locations hit by electrons. The CRT is evacuated, so there are few gas molecules present for the electrons to...

Sorry for that typo! The actual function is y=1/SQRT(1-V2/C2). In finding the parts of this maclaurin series, I have... y(0)=1/SQRT(1-X2)(X-0)0=1 y'(0)=(1/2)(1-X2)(-3/2)*X2 y''(0)=(1/2)(1-X2)(-3/2)*X2+(1-X2)(-3/2)*(1-X2)(-5/2)*3X4 Sorry for my lack of showing my work, but I believe those...

Homework Statement Using the technique of Taylor expansion, find an approximate expression for the relativistic factor γ for small v (i.e., expanded around v = 0) that is correct to order v2. Homework Equations γ=1/SQRT(1+ V2/C2). But in class, my professor just substituted X=V/C, so...

Homework Statement A sportscar, Fiasco I, can accelerate uniformly to 68 m/s in 30 s. Its maximum braking rate cannot exceed 0.75g. What is the minimum time required to go 1300 m, assuming the car begins and ends at rest? (Hint: A graph of velocity vs. time can be helpful.) Homework Equations...