A disk is rotating about a vertical axis of rotation without displacing. A child is initially at the center of the rotating disk. If the child walks to the edge of the disk, what values would change? (Select all that apply)   - angular velocity - angular momentum - rotational energy - rotational inertia  - net external torque

11- The angular position of a point on a wheel is given as 0= 5 + 10t + 2t^2 (rad). If the point is 0.5 m from the center of the wheel, what is the total acceleration of this wheel in m/s^2 for t=2s? A) 120,8 B) 175,4 C) 300,4 D) 214,7 E) 162,01

17. A tennis player's elbow is fully extended during impact with the ball. This is beneficial compared to a partially bent elbow because. the torque due to gravity will be increased i the linear velocity of the racquet head will be higher as long as the angular velocity is also high the coefficient of restitution will be greater the angular inertia of the racquet will be decreased allowing for a greater angular acceleration 18. A large spin is put on a jump serve in volleyball to accelerate the ball downwards once it passes the net. The topspin can be maximized by creating a greater torque with a force on the bottom of the ball contact the ball at a greater height from the ground hit with a greater force directed through the It's center generating a large torque onto the ball with frictional forces during contact

A car is traveling with constant velocity along a highway. The driver notices he is late for work, so he stomps down on the gas pedal and the car begins to speed up. The car has just achieved double its initial velocity when the driver spots a police officer behind him and applies the brakes. The car then slows down, coming to rest at a stoplight ahead. Draw a complete motion diagram for this situation.

10- 8- 4- 1 2 4 Time (s) A disk of radius 50 cm rotates about a center axle. The angular position as a function of time for a point on the edge of the disk is shown. Which two of the following quantities of the point on the edge of the disk can be correctly mathematically determined from the graph using the methods described? Justify your selections. Select two answers. The angular velocity, because this quantity can be determined by calculating the slope of the graph. A The translational speed, because В V = rw. The angular acceleration, because this quantity can be determined by calculating the area bound by the curve and the horizontal axis from 0 s to 5 s. The translation acceleration, because a = Angular Position (rad)

References A A 4 States) Aa - A-at-A- R % Mailings Review EEST F 5 -- T 164- Paragraph The angular position of a rotational object is given by 0-(4 rad/3) t3 The diameter of the object is Q Búsqueda 6 View 2.17 meters. Calculate the average angular velocity in radians/seconds between t = 4.57 seconds and T = 5.84 seconds. ♫+ & 7 -B (Ctrl)- 18144 U Tell me what you want to do... * y AaBbCcDc AaBbCcDc AaBbC AaBbCct AaB = 1 Normal T No Spac... Heading 1 Heading 2 Title S 19 D-II 8 - ( ho PPI 9 O O Styles U prt sc 00

8) The rotational inertia about the center of a figure skater is 2.5 kg-m2 while her arms are outstretched and 1.5 kg-m2 while her arms are folded against her body. If she has an angular velocity of 6 rad/s while her arms are outstretched, what would be her angulan velocity while her arms are folded against her body?

The rotational inertia of an object depends on  Group of answer choices the amount of torque applied to it. its color. how its mass is distributed about the spin axis. how fast it is spinning.

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