52 An object with a mass of 0.8 kg and radius of 23 cm starts from rest and rolls without slipping down the ramp shown above and reaches a final speed of 6.6 r in 1.5 s. Determine (a) the distance it rolled parallel to the ramp and (b) the rotational inertia of the object about its center-of-mass. a. d = b. Icom |kg m2 E
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- A rotating wheel requires 6.00 s to rotate 28.0 revolutions. Its angular velocity at the end of the 6.00-s interval is 95.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel? rad/s24. A skater has a moment of inertia of 105.0 kg.m² when his arms are outstretched and a moment of inertia of 64.0 kg.m² when his arms are tucked in close to his chest. If he starts to spin at an angular speed of 80.0 rpm (revolutions per minute) with his arms outstretched, what will his angular speed be when they are tucked in? rpmA dentist's drill starts from rest. After 3.50 s of constant angular acceleration it turns at a rate of 2.30 x 104 rev/min. (a) Find the drill's angular acceleration. rad/s2 (b) Determine the angle (in radians) through which the drill rotates during this period. rad
- V = 4 m/s ac µ = 0.1 Center of rotation R = 20 m Car around corner A 400 kg car is going around a curb as shown. The radius of the turn is 20 m and the car has a velocity of 4 m/s. The coefficient of friction between the tires and the road is 0.1 a. What is the angular velocity of the car? a. Will the car make the turn?A rotating wheel requires 7.00 s to rotate 30.0 revolutions. Its angular velocity at the end of the 7.00-s interval is 99.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel? rad/s²ii) A uniform sphere made of modeling clay has radius R and moment of inertia I₁ for rotation about a diameter. It is then flattened to a disk with the same radius R. What is the moment of inertia of the disk, Id, in terms of I₁? a. Id=511/4 b Id = 511/2 c. Id = 511 d. Id = 411/5 e. Id = 211/5 f. Id = I1/5
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