2019 #4 Free Response Question - AP Physics 1 - Exam Solution

The video tutorial covers question #4 from the 2019 AP Physics One exam. It begins with an introduction to the problem, which involves a motor lifting a block at constant speed. Part A requires determining an expression for mechanical power, which is solved by equating the force of tension to the force of gravity. Part B involves modifying the circuit to decrease the time interval by adding a resistor, with the solution focusing on increasing the current through the motor. The tutorial emphasizes understanding mechanical power and circuit analysis.

What is the expression for mechanical power in terms of mass, height, time interval, and physical constants?

Explain how the force of tension relates to the mechanical work done on the block.

How does the addition of a resistor in the circuit affect the time interval delta T?

What is the relationship between electric potential difference and mechanical power in the context of the motor?

Describe the effect of placing resistor 2 in parallel with resistor 1 on the current in the circuit.