For items 7-13 choose the letter of the best answer. No need to give explanations. 7. A force of 17 N is applied to the end of a 0.63-m long torque wrench at an angle 45° from a line joining the pivot point to the handle. What is the magnitude of the torque about the pívot point produced by this force? A. 10.7 N.m B. 9.7 N.m C. 12.0 N.m D. 7.6 N.m 8.How long does it take for a rotating object to speed up from 15.0 rad/s to 33.3 rad/s if it has a uniform angular acceleration of 3.45 rad/s2? A. 4.35 s B. 5.30 s C. 10.6 s D. 63.1 s 9. A boy and a girl are balanced on a massless seesaw. The boy has a mass of 60 kg and the girl's mass is 50kg. If the boy sits 1.5 m from the pivot point on one side of the seesaw, where must the girl sit on the other side for equilibrium? A. 1.8 m В. 1.3 m C. 2.5 m D. 3.0 m 10. A pulley has an initial angular speed of 12.5 rad/s and a constant angular acceleration of 3.41 rad/s2. Through what angle does the pulley turn in 5.26 s? A. 113 rad B. 22.6 rad С. 19.3 rad D. 160 rad
For items 7-13 choose the letter of the best answer. No need to give explanations. 7. A force of 17 N is applied to the end of a 0.63-m long torque wrench at an angle 45° from a line joining the pivot point to the handle. What is the magnitude of the torque about the pívot point produced by this force? A. 10.7 N.m B. 9.7 N.m C. 12.0 N.m D. 7.6 N.m 8.How long does it take for a rotating object to speed up from 15.0 rad/s to 33.3 rad/s if it has a uniform angular acceleration of 3.45 rad/s2? A. 4.35 s B. 5.30 s C. 10.6 s D. 63.1 s 9. A boy and a girl are balanced on a massless seesaw. The boy has a mass of 60 kg and the girl's mass is 50kg. If the boy sits 1.5 m from the pivot point on one side of the seesaw, where must the girl sit on the other side for equilibrium? A. 1.8 m В. 1.3 m C. 2.5 m D. 3.0 m 10. A pulley has an initial angular speed of 12.5 rad/s and a constant angular acceleration of 3.41 rad/s2. Through what angle does the pulley turn in 5.26 s? A. 113 rad B. 22.6 rad С. 19.3 rad D. 160 rad
For items 7-13 choose the letter of the best answer. No need to give explanations. 7. A force of 17 N is applied to the end of a 0.63-m long torque wrench at an angle 45° from a line joining the pivot point to the handle. What is the magnitude of the torque about the pívot point produced by this force? A. 10.7 N.m B. 9.7 N.m C. 12.0 N.m D. 7.6 N.m 8.How long does it take for a rotating object to speed up from 15.0 rad/s to 33.3 rad/s if it has a uniform angular acceleration of 3.45 rad/s2? A. 4.35 s B. 5.30 s C. 10.6 s D. 63.1 s 9. A boy and a girl are balanced on a massless seesaw. The boy has a mass of 60 kg and the girl's mass is 50kg. If the boy sits 1.5 m from the pivot point on one side of the seesaw, where must the girl sit on the other side for equilibrium? A. 1.8 m В. 1.3 m C. 2.5 m D. 3.0 m 10. A pulley has an initial angular speed of 12.5 rad/s and a constant angular acceleration of 3.41 rad/s2. Through what angle does the pulley turn in 5.26 s? A. 113 rad B. 22.6 rad С. 19.3 rad D. 160 rad
For items 7-13 choose the letter of the best answer. No need to give explanations.
7. A force of 17 N is applied to the end of a 0.63-m long torque wrench at an angle 45° from a line joining the pivot point to the handle. What is the magnitude of the torque about the pívot point produced by this force?
A. 10.7 N.m
B. 9.7 N.m
C. 12.0 N.m
D. 7.6 N.m
8.How long does it take for a rotating object to speed up from 15.0 rad/s to 33.3 rad/s if it has a uniform angular acceleration of 3.45 rad/s2?
A. 4.35 s
B. 5.30 s
C. 10.6 s
D. 63.1 s
9. A boy and a girl are balanced on a massless seesaw. The boy has a mass of 60 kg and the girl's mass is 50kg. If the boy sits 1.5 m from the pivot point on one side of the seesaw, where must the girl sit on the other side for equilibrium?
A. 1.8 m
В. 1.3 m
C. 2.5 m
D. 3.0 m
10. A pulley has an initial angular speed of 12.5 rad/s and a constant angular acceleration of 3.41 rad/s2. Through what angle does the pulley turn in 5.26 s?
A. 113 rad
B. 22.6 rad
С. 19.3 rad
D. 160 rad
11. At t=0, a wheel rotating about a fixed axis at a constant angular acceleration has an angular velocity of 2.0 rads. Two seconds later it has turned through 5.0 complete revolutions. What is the angular acceleration of this wheel?
A. 17 rad/s2
B. 14 rad/s?
C. 20 rad/s2
D. 23 rad/s?
12. At t=0, a wheel rotating about a fixed axis at a constant angular acceleration of-0.40 rad/s2 has an angular velocity of 1.5 rad/s and an angular position of 2.3 rad. What is the angular position of the wheel at t=2.0s ?
A. 4.9 rad
B. 4.7 rad
C. 4.5 rad
D. 4.3 rad
13. A wheel rotating about a fixed axis has an angular position given by 0 = 3.0 - 2.0t3, where angular displacement is measured in radians and t in seconds. What is the angular acceleration of the wheel at t = 2.0 s?
A. -1.0 rad/s2
B. -24 rad/s2
C.-2.0 rad/s2
D.-4.0 rad/s?
Definition Definition Angle at which a point rotates around a specific axis or center in a given direction. Angular displacement is a vector quantity and has both magnitude and direction. The angle built by an object from its rest point to endpoint created by rotational motion is known as angular displacement. Angular displacement is denoted by θ, and the S.I. unit of angular displacement is radian or rad.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.
