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1. ### 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

2. ### A small car travels at constant speed on the inside of a track that is a vertical circle with radius 5.00 m. ?

m*V^2/r-m*g = 6  m(V^2/5-g) = 6 m = 6/(V^2/5-g)  ...where the quantity V^2/5-g must be positive (V^2/5 > g)

1 Answers · Science & Mathematics · 06/05/2020

3. ### Projectile forces question...?

...5(-4.12) Hence, F = 10.3 Newtons Now, F = μR so, 10.3 = μ(2.5 x 9.8) => 24.5μ Therefore, μ = 10.3/24.5 =>...

2 Answers · Science & Mathematics · 24/05/2020

4. ### How does gravity keep us on Earth.?

... middle school we learn Newton's model.  W = mGM/R^2 where you, for example, are the mass m and M is Earth...

5 Answers · Science & Mathematics · 10/05/2020

5. ### rockets velocity?

...after engine shutoff, KE + GPE = constant ½mv² - GmM/R = k and if we divide through by the rocket's mass m we get v²/2 - GM...

1 Answers · Science & Mathematics · 12/05/2020

6. ### The two wires shown in the figure carry currents of 5.00 A in opposite directions and are separated by (pic)?

...current-carrying wire is B = µ₀*I / 2πr where µ₀ = 4πe-7 T·m·s/C so B = µ...

1 Answers · Science & Mathematics · 21/05/2020

7. ### Physics help?

...*2.00m*cos36.8º + 360N*(5.00m - 1.50m*cos53.13º) - R*5.00m where R is the vertical force under the right leg R = 449...

1 Answers · Science & Mathematics · 14/05/2020

8. ### physics experts?

...in this situation, so we just need to find the centripetal force: F = mv²/r = 9.11*10^-31 * (2.29*10^6)² / (5.23*10^-11) . .= 9.13*10^-8 N (b...

2 Answers · Science & Mathematics · 06/05/2020

9. ### If the blocks are released from rest, how long does it take the 4.0 kg block to reach the floor?

...0.06m - 0.60N·m) / 0.00342kg·m² so the linear acceleration a = α*r = α * 0.06m a = ([4.0kg*(9.8m/s² - a) - M*(9.8m/s² + a)]*0...

3 Answers · Science & Mathematics · 01/05/2020

10. ### angular acceleration problem?

a) angular velocity = d/dt(theta) = 2t + 6 t’2 = 2+6 = 8 rad/sec. b) angular acceleration = 2 + 12 t = 14 rad/ sec’2. c) at r =0.5 m, angular acceleration = 14 rad/sec’2 and tangential acceleration a = r xalpha = 0.5 x14 = 7 m/sec’2.

1 Answers · Science & Mathematics · 22/05/2020