Kinematics
Unlike distance, which tracks the total path traveled, this vector quantity represents the straight-line change in an object's position from start to finish.
What is displacement?
This property of an object, directly measured by its mass, describes its natural tendency to resist any change in its state of motion.
What is inertia?
This is the amount of work done by a waiter carrying a 50 N tray at a constant velocity across a 10 m level floor.
What is zero?
This rotational analog of mass depends not just on how much matter an object has, but also on how that mass is distributed relative to the axis of rotation.
What is the Moment of Inertia?
This term describes the time it takes for a system in simple harmonic motion—like a pendulum or a mass on a spring—to complete one full cycle of its motion.
What is the period?
If you are looking at a velocity vs. time graph, the steepness, or slope, of the line provides you with this specific physical value.
What is acceleration?
If you apply the same net force to an object with triple the mass, the resulting acceleration will be reduced to this fraction of the original.
What is one-third?
Daily Double
A car traveling at three times its original speed will require this many times more distance to stop.
What is nine times?
To maximize this quantity, which causes angular acceleration, one should apply a force as far from the pivot point as possible and at a 90 degree angle.
What is torque?
In a spring-block system oscillating horizontally, this is the specific location where the net force on the block is zero and its kinetic energy is at its absolute maximum.
What is the equilibrium position?
Ignoring air resistance, an object dropped from rest will have a velocity of approximately this many meters per second after falling for exactly 3 seconds. (Assume g = 10 m/s^2).
What is 30 meters per second?
This specific type of contact force always acts parallel to the surfaces in contact and must be overcome to initiate the motion of a stationary object.
What is static friction?
In this specific type of collision, the objects stick together after impact, resulting in the maximum possible loss of kinetic energy for the system.
What is Impulse?
According to this conservation law, when a spinning diver pulls their arms inward to decrease their moment of inertia, their angular velocity must increase.
What is the Conservation of Angular Momentum?
This principle states that any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.
What is Archimedes’ Principle?
In standard projectile motion (where air resistance is negligible), this is the value of the horizontal acceleration component throughout the entire flight.
What is zero?
When a car travels at a constant speed around a flat, unbanked circular track, this specific force provides the centripetal acceleration required to keep the car on its path.
What is static friction?
On a graph of Force vs. Time, this represents the change in an object's momentum.
What is Impulse?
A hoop and a solid disk of equal mass and radius are released from the top of a ramp. This is the reason the disk reaches the bottom first.
What is a lower moment of inertia?
According to the continuity equation for an incompressible fluid, if the radius of a pipe is reduced by exactly half, the velocity of the fluid must increase by this specific factor.
What is four?
To find the total change in an object's velocity over a specific time interval, one must calculate this on an acceleration vs. time graph.
What is the area under the curve?
In a collision between a massive 18-wheeler and a tiny parked scooter, this law dictates that the magnitude of the force exerted by the truck on the scooter is exactly equal to the force exerted by the scooter on the truck.
What is Newton’s Third Law?
If the "system" is defined as only a falling ball (excluding the Earth), the change in the ball’s kinetic energy is not caused by a change in potential energy, but rather by this external quantity.
What is work done by gravity?
In a "real" Atwood machine where the pulley has significant mass, the tension in the string on either side of the pulley is not equal for this specific reason.
What is the need for a net torque to accelerate the pulley?
For an object in Simple Harmonic Motion, doubling the amplitude of the oscillation will double the maximum velocity, but it will increase the total mechanical energy of the system by this factor.
What is four?