11. A truck (m = 2700 kg) is passing the middle of a bridge whose radius of curvature is 350 meters. There is a scale mounted on the surface of the bridge and it reads 30,000 N as the truck passes through. What is the speed of the truck? a. 16.7 m/s c. 26 m/s b. 34 m/s d. 21 m/s R Z
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- 4. A Ferris wheel has a radius of 9.00 m and is set so that its passengers move at 3.00 m/s. The mass of a passenger is 60 kg. a. What is the passenger's normal force when the Ferris wheel is at the bottom of its path? b. What is the force factor at the bottom? c. What is the passenger's normal force at the top? d. What is the force factor at the top?Josh is painting yellow stripes on a road using a paint roller. To roll the paint roller along the road, Josh applies a force of 15 N at an angle of 45° with respect to the road. The mass of the roller is 2.5 kg; and its radius is 4.0 cm. Ignoring the mass of the handle of the roller, what is the magnitude of the tangential acceleration of the roller? A. 4.2 m/s2 B. 6.0 m/s2 C. 15 m/s2 D. 110 m/s2A ball having a mass of 5.2 kg is swinging at the end of a cord in a vertical circle of radius 2 m at 5 rev/s. What is the tension in the cord when the ball is a. at the level of the center? b. At the bottom of the vertical circle?
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- A 2000 kg car going at a steady speed of 18.0 m/s takes a curve with a 50.0 m radius. The road is level. 1. Draw an FBD. 2. Find the centripetal force of the car. 3. Find the frictional force of the car. 4. Find the weight of the car. 5. What is the minimum value that the coefficient of static friction between the tires and the road must have so that the car takes this curve without slipping?choose all that apply to centripetal force. A. twice the radius needs half the centripetal force. x B. Gravitational and electrical forces can produce centripetal forces. C. Twice the speed needs four times the centripetal force. D. Centripetal force depends on the mass, tangential speed and radius of the curvature. E. Centripetal force depends on tangential spreed and radius of curvature . F. Measured in the units of N or kg m/s^2 G. Any type of force directed towards a fixed center. I chose everything except answer E and got it wrong.A 2.1 kg ball on a 3.7 m string is spun in a horizontal circle. The ball's tangential velocity is 1.9 m/s. What is the tension on the string? A. 1.1 N B. 2.1 N C. 4.1 N D. 3.3 N
- A 2kg toy is moving in a circle of radius 2.5 m with a speed of 3m/s.Calculate the centripetal acceleration of the toy? choose one correct answer with the correct units. A. 3.6 m/s^2 B. 1.2 m/s^2 C. 3.6 m/s D. 0.833 m/s^2A 4.0 kg car is traveling around a vertical loop with a radius of 2 m. What is the normal force from the surface of the track when the car is at its highest point if it is moving with a speed of 5 m/s? A.40 N B.90 N C.50 N D.10 NWhat is the conversion of 6 times per minute to seconds?