1 Problems 13 A disc rotates about an axis through its center according to the relation θ (t) = t 4 /4 2t


 Owen Quinn
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1 Slide 1 / 30 1 Problems 13 disc rotates about an axis through its center according to the relation θ (t) = t 4 /4 2t etermine the angular velocity of the disc at t= 2 s 2 rad/s 4 rad/s 6 rad/s 8 rad/s 10 rad/s
2 Slide 2 / 30 2 Problems 13 disc rotates about an axis through its center according to the relation θ (t) = t 4 /4 2t etermine the angular acceleration of the disc at t = 3 s. 9 rad/s 2 27 rad/s 2 6 rad/s 2 25 rad/s 2 2 rad/s 2
3 Slide 3 / 30 3 Problems 13 disc rotates about an axis through its center according to the relation θ (t) = t 4 /4 2t etermine the linear speed of a point on the disc 50 cm from the center at t = 1 s m/s 1 m/s 1 m/s 1.5 m/s 4 m/s
4 Slide 4 / 30 4 Problems 45 hulahoop with moment of inertia is rotating with an angular velocity of ω (t) = 3t 2 1. Through what angular displacement will the hulahoop move in the first 5 s? 30 rad 45 rad 90 rad 100 rad 120 rad
5 Slide 5 / 30 5 Problems 45 hulahoop with moment of inertia is rotating with an angular velocity of ω (t) = 3t 2 1. What is the linear acceleration of the hulahoop at t= 3 s at a point of R = 2 m? 3 m/s 2 10 m/s 2 18 m/s 2 36 m/s 2 48 m/s 2
6 Slide 6 / 30 6 Problems 67 rod is pivoted about its center and rotating at 2 rad/s. It increases uniformly in angular velocity to 14 rad/s in 3 s. Find the angular acceleration over the 3 s period. 2 rad/s 2 4 rad/s 2 6 rad/s 2 8 rad/s 2 14 rad/s 2
7 Slide 7 / 30 7 Problems 67 rod is pivoted about its center and rotating at 2 rad/s. It increases uniformly in angular velocity to 14 rad/s in 3 s. Find the angular displacement over the 3 s period. 24 rad 48 rad 3 rad 2 rad 12 rad
8 Slide 8 / 30 8 Problems 89 bicycle wheel with a radius of 40 cm is spinning at a certain instance with an angular speed of 10 rad/s. The angular speed is increasing at 80 rad/s 2. t this instant, find the tangential component of the bicycle s acceleration. 8 m/s 2 2 m/s 2 32 m/s 2 25 m/s 2 40 m/s 2
9 Slide 9 / 30 9 Problems 89 bicycle wheel with a radius of 40 cm is spinning at a certain instance with an angular speed of 10 rad/s. The angular speed is increasing at 80 rad/s 2. t this instant, find the centripetal component of the bicycle s acceleration. 12 rad/s2 24 rad/s2 32 rad/s2 36 rad/s2 40 rad/s2
10 Slide 10 / Problems record on a turntable is spinning and coming to rest. t t=0s the angular velocity of the disc is 20 rad/s and its angular acceleration is constant at 5 rad/s 2. How long does it take for the record to come to rest? 2 s 4 s 8 s 10 s 12 s
11 Slide 11 / Problems record on a turntable is spinning and coming to rest. t t=0s the angular velocity of the disc is 20 rad/s and its angular acceleration is constant at 5 rad/s 2. What is the disc s angular velocity at t = 0.5 s? 10 rad/s 15 rad/s 16.5 rad/s 17.5 rad/s 19.5 rad/s
12 Slide 12 / Problems record on a turntable is spinning and coming to rest. t t=0s the angular velocity of the disc is 20 rad/s and its angular acceleration is constant at 5 rad/s 2. What is the angular displacement of the record through t = 2s? 30 rad 15 rad 40 rad 50 rad 25 rad
13 Slide 13 / tire is rolling with an initial angular velocity of 10 rad/s. It decelerates with an angular acceleration of 5 rad/s 2 and comes to rest. What is the net angular displacement of the wheel? 5 rad 10 rad 20 rad 25 rad 30 rad
14 Slide 14 / Find the displacement of a wheel if the radius is 8 m and the angular displacement of the wheel is 3 rad. 3 m 9 m 24 m 36 m 48 m
15 Slide 15 / n angular acceleration of a bowling ball is given by α (t) = 2t + 3. If the object starts from rest what is the angular velocity of the bowling ball at t = 4 s? 12 rad/s 8 rad/s 16 rad/s 28 rad/s 32 rad/s
16 Slide 16 / If an object starts from rest and accelerates with a constant angular acceleration of 6 rad/s 2 what is the angular velocity at 3 s? 9.5 rad/s 18 rad/s 13 rad/s 27 rad/s 10.5 rad/s
17 Slide 17 / The angular acceleration of an object is given by α (t) = 3t + 2. If the object starts from rest what is the angular displacement of the object at the end of t= 3s? 9.5 rad 22.5 rad 27 rad 12 rad 5 rad
18 Slide 18 / Questions n object has an initial angular velocity of zero and begins to accelerate. Its new angular velocity is given by the equation, ω=4t 25t. What is the angular velocity of the object at t=4s 44 rad/s 64 rad/s 84 rad/s 92 rad/s 104 rad/s
19 Slide 19 / Questions n object has an initial angular velocity of zero and begins to accelerate. Its new angular velocity is given by the equation, ω=4t 25t. What is the angular acceleration of the object at time t=3s? 5 rad/s 2 11 rad/s 2 19 rad/s 2 24 rad/s 2 29 rad/s 2
20 Slide 20 / Questions n object has an initial angular velocity of zero and begins to accelerate. Its new angular velocity is given by the equation, ω=4t 25t. What is the angular displacement that the object covered in time t=3s 6.25 rad 13.5 rad 17 rad 22 rad 27.5 rad
21 Slide 21 / Questions car whose tire has a radius of.5m has an angular velocity given by 3t 25t+20. Find the angular velocity of the tire at t=2s. 14 rad/s 22 rad/s 24 rad/s 27 rad/s 30 rad/s
22 Slide 22 / Questions car whose tire has a radius of.5m has an angular velocity given by 3t 25t+20. Find the velocity of the wheel at time t=2s. 7 m/s 11 m/s 12 m/s 13.5 m/s 15 m/s
23 Slide 23 / Questions car whose tire has a radius of.5m has an angular velocity given by 3t 25t+20. What angular distance does the tire sweep through in 4 seconds? 85 rad 96 rad 104 rad 108 rad 110 rad
24 Slide 24 / Questions car whose tire has a radius of.5m has an angular velocity given by 3t 25t+20. What is the horizontal distance that the object traveled? 26 m 52 m 66 m 72 m 83 m
25 Slide 25 / Questions car whose tire has a radius of.5m has an angular velocity given by 3t 25t+20. Find the angular acceleration of the tire at t=1 second..25 rad/s 2.5 rad/s 2.75 rad/s 2 1 rad/s rad/s 2
26 Slide 26 / Questions car whose tire has a radius of.5m has an angular velocity given by 3t 25t+20. Find the centripetal acceleration of the tire at t=2s. 121 m/s m/s m/s m/s m/s 2
27 Slide 27 / n object has an initial angular velocity of 5 rad/s and undergoes an angular acceleration of 15 rad/s 2, what is the final angular velocity after 3 seconds. 25 rad/s 35 rad/s 50 rad/s 65 rad/s 80 rad/s
28 Slide 28 / n object has a final angular velocity of 25 rad/s and sweeps through 80 rads with an angular acceleration of 2.5 rad/s 2. What is the initial angular velocity? 15 rad/s 25 rad/s 32 rad/s 48 rad/s 52 rad/s
29 Slide 29 / n object has an initial angular velocity of 5 rad/s and undergoes a constant angular acceleration of rad/s 2. What is the net distance it sweeps through in 3 seconds? rad rad rad rad 21.5 rad
30 Slide 30 / ball is attached to a string and rotates in a circle. If it takes 1 second to complete 1 revolution what is the angular speed of the ball? 3.14 rad/s 6.28 rad/s 9.42 rad/s rad/s rad/s