38. A long, thin rod is cut into two pieces, one being twice as long as the other. To the midpoint of piece A (the longer piece), piece B is attached perpendicularly, in order to form the inverted “T" shown in the drawing. The application of a net external torque causes this object to rotate about axis 1 with an angular acceleration of 4.6 rad/s². When the same net ex- ternal torque is used to cause the object to rotate about axis 2, what is the angular acceleration? |Axis 2 Axis 1

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A force F⃗ =7i^+2.7k^ N is applied at the point (3,0,1) m. What is the y component of the torque?

A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.168 rad/s2. After making 2870 revolutions, its angular speed is 146 rad/s. (a) What is the initial angular velocity of the turbine? (b) How much time elapses while the turbine is speeding up?

A hollow disk with a moment of inertia of 0.5 kg-m2 experiences a net torque of 30 m-N. What is the disk's angular acceleration?   60 rad/s/s   0.02 rad/s/s   30 rad/s/s   15 rad/s/s

An automobile engine can produce 253 Nm of torque. Calculate the angular acceleration (in rad/s2) produced if 80.2% of this torque is applied to the drive shaft, axle, and rear wheels of a car, given the following information. The car is suspended so that the wheels can turn freely. Each wheel acts like a 15.0 kg disk that has a 0.180 m radius. The walls of each tire act like a 2.00 kg annular ring that has inside radius of 0.180 m and outside radius of 0.320 m. The tread of each tire acts like a 10.0 kg hoop of radius 0.330 m. The 12.1 kg axle acts like a rod that has a 2.00 cm radius. The 29.7 kg drive shaft acts like a rod that has a 3.20 cm radius. rad/s² t Additional Materials Reading

A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.42 x 104 rad/s to an angular speed of 3.60 x 104 rad/s. In the process, the bit turns through 2.50 x 104 rad. Assuming a constant angular acceleration, how long would it take the bit to reach its maximum speed of 9.41 x 104 rad/s, starting from rest?

An object has a moment of inertia of 5.73 kg m², and a torque of 18.7 N · m is applied on it. What is the angular acceleration of the object in unit of rad/s?

A power drill starts from rest and undergoes uniform angular acceleration for a period of 0.175 s until it turns at a rate of 2.80 x 104 rev/min. (a) What is the drill's angular acceleration (in rad/s2)? (Enter the magnitude.) rad/s2 (b) What is the angle (in radians) through which the drill rotates during this period? (Enter the magnitude.) rad

A bar on a hinge starts from rest and rotates with an angular acceleration a = 10 + 6t, where a is in rad/s2 and t is in seconds. Determine the angle in radians through which the bar turns in the first 4.00 s.