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1. ### A car is traveling around a horizontal circular track with radius r = 230 m as shown. It takes the car t = 52 s to go around the track once.?

...ω = 2PI / T = PI / 26 rad/sec  tangential speed Vt = ω * r = 230PI/26 = 27.8 m/sec  2)What is the x component Vtx...

2 Answers · Science & Mathematics · 14/07/2020

2. ### Force = (−7.0 N)i + (5.0 N)j acts on a particle with position vector r = (4.0 m)i hat + (3.0 m)j.?

(a) τ = r x F τ = (4.0, 3.0, 0)m x (-7.0, 5.0, 0)N = (0, 0, 41) N·m or 41 k hat N·m ◄ (b) cosΘ = a•b / |a|*|b| r •F = 4.0*-7.0+3.0*5.0 = -13 | r | = √(4.0² + 3.0²) m = 5...

1 Answers · Science & Mathematics · 01/10/2020

3. ### A thin, hollow sphere of radius r = 0.540 m and mass m = 13.5 kg turns counterclockwise about a vertical axis through its center.?

...inertia in kg•m² I = cMR²     M is mass (kg), R is radius (meters)     c = 1 for a ring or hollow cylinder     c = 2/5...

1 Answers · Science & Mathematics · 23/10/2020

4. ### What is the resistance R  ?

On the right side, the resistance is from 1/S = 1/ R + 1/(2R) + 1/ R = 5/(2R). So then S = 2R...

2 Answers · Science & Mathematics · 30/07/2020

5. ### When the particle has the position vector r = (2.00 m)i − (3.00 m)j + (2.00 m)k, the force is F = Fxi + (7.00 N)j − (7.10 N)k?

τ = r x F where τ, r and F are vectors and x represents...

1 Answers · Science & Mathematics · 30/07/2020

6. ### Consider a freely spinning merry-go-round, which can be treated as a uniform disc of radius R and mass m1 rotating about a vertical?

4. Li = m2 v R / 4  m2*v* R /4 = (½*m1*R² + m2*( R /4)²... R /16)*w 4v = (8R+ R )*w = 9Rw w = 4v / 9R for v=6 R =12 w = 4*6 / 9*12 = 2/9 = 0.22 rad/s

1 Answers · Science & Mathematics · 13/05/2020

7. ### A car is traveling around a horizontal circular track with radius r = 230 m at a constant speed v = 17 m/s as shown.?

1) the car's acceleration is radial: a = v² / R = (17m/s)² / 230m = 1.26 m/s² If the car is ...

1 Answers · Science & Mathematics · 02/08/2020

8. ### In a series RL circuit like the figure, ε0 = 32 V , R = 3.2 Ω , and L = 3.0 H?

Use the equation... i = -Vo/ R *ln(1 - iR/Vo) i = 7.1, Vo = 32, R = 3.2, L = 3, t = ? now transpose equation to make t the subject... plug in the values & t = 1.16 secs

1 Answers · Science & Mathematics · 13/03/2020

9. ### You connect a battery, resistor, and capacitor as in (Figure 1), where E = 51.0 V, C = 5.00 μF, and R = 110 Ω. The switch S is closed at t= 0?

T = R *C = 5.0 *110 =  0.55 msec  8/51 = 1-e^-k 43/51 = e^-k k = -ln 43/51 = 0.1706 = t/T t = T*0.1706 = 94 μ sec

1 Answers · Science & Mathematics · 10/03/2020

10. ### A satellite in Earth orbit has a mass of 109 kg and is at an altitude of 1.98 106 m. (Assume that U = 0 as r → ∞.)?

...h = 8.358 x10^6 m Gravitational potential energy U = GMm/ r -->  set r = a, m = 109 kg and M = 5.972 x 10^24 kg U = 5.195x10...

1 Answers · Science & Mathematics · 31/10/2020