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1. ### Pulling Disk on Frictionless Surface?

...*t = ½ * 8.00m/s * 4s = 16 m ◄ a rotation: τ = F*r = I*α and since there is no reason to think that rotation would occur about...

2 Answers · Science & Mathematics · 14/11/2019

2. ### A car with a mass of 1977kg goes around a curve that has a radius of 57.0m. ?

...the centripetal force is equal to the maximum static friction force: f = mv²/r 5810 N = 1977kg * v² / 57.0m solves to max v = 12.9 m/s ◄ or...

1 Answers · Science & Mathematics · 13/11/2019

3. ### Rotational Kinematics HW Help?

...22.28 rad/s [ans c] Centripetal acceleration = ω²r ... ... ... [r = radius of circular motion (for the point)] ... ... ... = (6.66)² (0.359) ... ... ... [35...

1 Answers · Science & Mathematics · 12/11/2019

4. ### Physics Help?

a = ω²r 4.37 mi  = 7033 m ω = √(a/r) = √(9.8/7033) = 0.0373 rad/s ω is usually labeled "angular velocity...circle in meters    ω is angular velocity in radians/sec = v/r    a is in m/s²

1 Answers · Science & Mathematics · 11/11/2019

5. ### related rates shadow rock?

...5+x)/10 = x/y When y = 3 m, solve this and get x = 2.143 m differentiate w/r/t time, using the quotient rule on the RHS: 0.1 * dx/dt = (1/y²...

2 Answers · Science & Mathematics · 07/11/2019

6. ### I need help with circular motion?

...the car in a circle at any given speed we need a centripetal acceleration of v^2 / r  = 4^2/523 To accelerate the car along a path we require an acceleration = dv/dt...

1 Answers · Science & Mathematics · 05/11/2019

7. ### Physics question?

...and the speed of the center of mass are related by the definition ω = v/r The kinetic energy is the sum of the translational and rotational ...

1 Answers · Science & Mathematics · 03/11/2019

8. ### The earth's radius is 6.37×106m; it rotates once every 24 hours. ?

...the shortest distance from the axis to our point of interest is r = 6.37 x 10^6 cos45 = 4.50 x 10^6 m The angular velocity of earth is...

1 Answers · Science & Mathematics · 31/10/2019

9. ### Calculate the force of Earth's gravity on a spacecraft 2.00 Earth radii above the Earth's surface if its mass is 1950 kg .?

2 R above the surface is 3 R from the center. So the acceleration of gravity is 1/9 of the surface value. Then force = mass * acceleration = 1950 * (9.80665 / 9) = 2124 newtons.

1 Answers · Science & Mathematics · 29/10/2019

10. ### A 250 g baseball is pitched at 26 m/s spinning at 45 rad/s . You can treat the baseball as a uniform solid sphere of radius 2.7 cm?

...moment of inertia in kg•m²I = cMR²    M is mass (kg), R is radius (meters)    c = 1 for a ring or hollow cylinder    c = 2/5...

1 Answers · Science & Mathematics · 20/10/2019