a) Is the torque about the pivot after pushing negative, positive or zero? b) What happens to the ball’s angular velocity after push has ended i) Steadily increase ii) Increase for a while, the hold steady iii) Hold steady iv) Decrease for a while, the hold steady v) Steadily decrease c) Is the torque about right after pushing negative, positive or zero?

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Answer 1

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Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

Chapter 12, Problem 9CQ

To determine

a) Is the torque about the pivot after pushing negative, positive or zero?

b) What happens to the ball’s angular velocity after push has ended

i) Steadily increase

ii) Increase for a while, the hold steady

iii) Hold steady

iv) Decrease for a while, the hold steady

v) Steadily decrease

c) Is the torque about right after pushing negative, positive or zero?

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PART III - RESISTORS IN PARALLEL Consider (but do not yet build) the circuit shown in the circuit diagram to the left, which we will call Circuit 3. Make sure you are using Bert bulbs. You may want to wire two batteries in series rather than use a single battery. 7. Predict: a) How will the brightness of bulb B3A compare to the brightness to bulb B3B? c) X E B3A b) How will the brightness of bulb BзA compare to the brightness of bulb B₁ from Circuit 1? How will the currents at points X, Y, and Z be related? www d) How will the current at point X in this circuit compare to the current at point X from Circuit 1? Y Z B3B www

Answer 2

Question

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

Chapter 12, Problem 9CQ

To determine

a) Is the torque about the pivot after pushing negative, positive or zero?

b) What happens to the ball’s angular velocity after push has ended

i) Steadily increase

ii) Increase for a while, the hold steady

iii) Hold steady

iv) Decrease for a while, the hold steady

v) Steadily decrease

c) Is the torque about right after pushing negative, positive or zero?

Expert Solution & Answer

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Answer 3

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Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

Chapter 12, Problem 9CQ

To determine

a) Is the torque about the pivot after pushing negative, positive or zero?

b) What happens to the ball’s angular velocity after push has ended

i) Steadily increase

ii) Increase for a while, the hold steady

iii) Hold steady

iv) Decrease for a while, the hold steady

v) Steadily decrease

c) Is the torque about right after pushing negative, positive or zero?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

Chapter 12, Problem 9CQ

To determine