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  1. ... * 5.98e24kg * (1.35e4s)² / 4π² R³ = 1.84e21 m³ → R = 1.226e7 m speed = circumference of orbit / time = 2π R / T v = 2π*1.226d7m...

    1 Answers · Science & Mathematics · 10/11/2020

  2. ...acceleration equals acceleration from gravity so equalize those two G M / r ^2 = v^2 / r On the left side is gravitational acceleration , on the right...

    2 Answers · Science & Mathematics · 10/11/2020

  3. ...speed, that is tangential velocity,  v,   is  :          v =  ( 2π r ) * ( # rev )  /  t All the objects have the  same  value for  2π r ...

    1 Answers · Science & Mathematics · 09/11/2020

  4. ...perpendicular we have: (↙) mgsin35° - Fric = 1.34m....(using F = ma) (↖) R = mgcos35° Also, Friction = µ. R i.e. Friction...

    2 Answers · Science & Mathematics · 12/11/2020

  5. first set of calculations: centripetal a = v²/ r = (20m/s)²/ r r = 10 m → a = 40 m/s² r = 20 m → a = 20 m/...

    1 Answers · Science & Mathematics · 10/11/2020

  6. ...so mgR = 2mR²α means that α = g/(2R) and so a = α R = g/2 ≈ 4.9 m/s² c) After 0.5 s, v = a*t = 4.9m/s²...

    1 Answers · Science & Mathematics · 08/11/2020

  7. Both kinematics and conservation of energy lead to an impact speed of v = √(2gh) = √(2g*2r) = √(2*9.8m/s²*2*0.1300m) = 2.257 m/s conserve momentum: 8.70kg * 2.257m/s = 8.70kg * -0.4332 * 2.257m/s + 13.200kg*V where V is the speed of the block after the collision. V = 0.8433 m/s Hope this...

    1 Answers · Science & Mathematics · 09/11/2020

  8. ...2*1.2m = 149 m²/s² → v = 12 m/s b) T = m*(v²/ r ± g) at bottom, T = 1.3kg * (14²/1.2 + 9.8)m/s² = 225 ...

    2 Answers · Science & Mathematics · 18/11/2020

  9. ...210 rad = -2.65 rad = -152º using the usual convention magnitude v = ω r = 42rad/s * 47m = 1974 m/s (units of "meters" assumed...

    2 Answers · Science & Mathematics · 05/11/2020

  10. ...force of tension acts tangent to the pulley and thus the angle between T and R is 90 degrees and the sin(90) is one. =>T x 0.8...

    1 Answers · Science & Mathematics · 05/11/2020

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