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A plastic disk is spun on an axle through its center by an electric motor, going from 0 to 1700 rpm in 7.0 s. What is the angular acceleration of the disk during this time? Show your work or explain your reasoning.

A nut needs to be tightened with a wrench.   Which force shown will apply the greatest torque to the nut? [parta] Which force shown will apply zero torque to the nut? [partb] Give a brief explanation of your reasoning for each part.

A 275 g book is initially pushed to the right across a table with a speed of 1.3 m/s. Friction exerts a 0.37 N force on the book, slowing it down. Draw a force diagram for this situation with forces labeled. In the next questions, you’ll be asked to solve for the book’s acceleration and how far it will travel.  In this situation, the net force points toward the [parta]. On your paper, draw a force diagram of the book as it is sliding across the table and label all forces appropriately.   

Reference back to the previous question where a typical 3.5 inch diameter hard disk in a computer spins at a constant 6700 rpm. What is the centripetal acceleration that this speck of dust experiences? Show your work or explain your reasoning.

Jordan’s final reflection—“Steady, not sprinting”—captures the transition from

The counselor reminds Jordan that moderate stress can enhance alertness. This statement reflects the concept of

The racing heart Jordan experiences when hearing an ambulance siren is an example of

When Jordan begins associating studying with calm focus rather than panic, this learning process demonstrates

While comparing study schedules with classmates, Jordan feels inadequate. This reaction most closely reflects

Reframing “I must be perfect” into “I can improve steadily” uses which cognitive-behavioral technique?