FOUR-MINUTE DRILL PROMPTS
The lists that follow are designed to help you study equations. Each prompt refers to a specific equation
on the AP Equations sheet (we’ve listed the prompts in the same order in which the equations appear on
the Equations sheet). So, for example, the prompt “Net force” refers to the equation, “F (^) net = ma .”
There are several ways to use these prompts. First, you can use them as a self-test: For each prompt,
write down the corresponding equation on a separate sheet of paper. Then check the equations you wrote
down against the AP Equations sheet to see if you got any wrong. You can also use these prompts when
you study with a friend: Have your friend read the prompts to you, and you respond by reciting the
appropriate equation. Try to go through the list as fast as possible without making a mistake. Last, your
physics teacher can use these prompts to lead your class through a four-minute drill, which is an activity
we describe in Chapter 6 .
Mechanics
1st kinematics equation
2nd kinematics equation
3rd kinematics equation
Net force
Force in terms of momentum
Impulse
Definition of momentum
Force of friction
Work
Kinetic energy
Power
Power—alternate expression
Gravitational potential energy near a planet
Centripetal acceleration
Torque
Newton’s second law for rotation
Definition of rotational inertia
Position of the center of mass
Conversion between linear and angular velocity
Angular momentum
Rotational kinetic energy
1st rotational kinematics equation
2nd rotational kinematics equation