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1. ### Please help physics, Position of a 100 g oscillating mass is given by x(t) = (2.0 cm) cos(2t), where t is in seconds, and the 2 is in rad/s.?

(b) The period. T = 2π/ω where ω is the coefficient of "t" in the trig argument. So T = 2π / 2rad/s = π s = 3.1 s (c) The spring constant, k. ω = √(k/m), so k = mω² = 0.10kg * (2rad/s)² = 0.40 kg/s² = 0.40 N/m (d) The maximum speed...

1 Answers · Science & Mathematics · 31/01/2015

2. ### A 3.10-kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal force of 29.0 N is required to hold?

... 1/2*m*v^2 + 1/2*k*x^2 = constant To get maximum KE, the SPE goes to 0. To get maximum SPE, KE goes to 0 1...

1 Answers · Science & Mathematics · 30/01/2015

3. ### Physics Help 10 Pts?

...spring is compressing. I will assume the didn't. GPE = SPE m*g*h = 1/2*k*x^2 x = sqrt(2*m*g*h / k) Plug in numbers x...

1 Answers · Science & Mathematics · 23/01/2015

...potential energy, kinetic energy, and will have loss energy to the work done by friction SPE = mgh + 0.5mv^2 + umgcos25(5.2) h = 5.2sin25 = 2.2 m SPE = 1.65(9.8)(2.2...

1 Answers · Science & Mathematics · 17/01/2015

... will always equal zero. At x = -0.0600 E = KE + GPE + SPE = 0 0.5(3.05)v^2 + 3.05(9.8)(-0.06) + 0.5(875)(-0.06)^2 = 0 1.525v^2 - 1.7934...

1 Answers · Science & Mathematics · 15/01/2015

6. ### Is light a form of energy, even though it is composed of photons, which have a (very small) mass?

... of spacetime itself. http://en.wikipedia.org/wiki/Mass_in_spe… http://en.wikipedia.org/wiki/Mass%E2%80%93energy_equivalence Scroll...

4 Answers · Science & Mathematics · 24/01/2015

7. ### You throw a 200 g rubber ball down from a height of 2 meters at a speed of 4 m/s?

... been elastic, ball would have bounced higher than 2 m} SPE = KE of ball as it impacted ground = 1/2mV = (0.5...

2 Answers · Science & Mathematics · 03/12/2014

...49.05/100 = 0.4905 m after additional stretch = 2.00 cm, total stretch of spring = 0.5105 SPE of spring at 2.00 cm = 1/2k(0.5105)² = (0.5)(100)(0.5105)² = 13.03...

1 Answers · Science & Mathematics · 19/11/2014