AP Physics 1 Exam Questions with
Correct Answers
Displacement (Δx) - Answer--Net change in position
-Measured in meters (m)
Δx = x(f) - x(i)
Velocity (v) - Answer--Speed and direction
-Measured in meters per second (m/s)
average v = Δx/t
Acceleration (a) - Answer--Rate of change of velocity w/ respect to time
-Measured in meters per second squared (m/s^2)
average a = Δv/t
Speeding up vs. Slowing Down - Answer--Speeding up occurs when velocity and
acceleration have the same sign
-Slowing down occurs when velocity and acceleration have opposite signs
Position vs. Time Graph - Answer--Slope represents average velocity
-Object changes direction when graph crosses x-axis
Velocity vs. Time Graph - Answer--Slope represents average acceleration
-Area represents displacement
Acceleration vs. Time Graph - Answer--Area represents change in velocity
Scalars - Answer-Quantities with only a size/magnitude (ex: speed, mass, length,
temperature, time, distance, energy, etc.)
Vectors - Answer-Quantities with both a size and direction (ex: displacement, velocity,
position, acceleration, force, etc.)
Projectile Motion - Answer--Horizontal and vertical components are independent of each
other
-Complementary angles travel same horizontal distance
-Larger angles travel higher and spend more time in air, while smaller angles have
greater horizontal velocities
Force (F) - Answer--A push or pull
-Measured in Newtons (N)
Newton's 1st Law - Answer-An object will move at a constant velocity in a frictionless,
airless vacuum unless another force is exerted on it
, Inertia - Answer--property of an object that resists a change in motion
-measured in mass
Newton's 2nd Law - Answer-Net force = mass x acceleration
Newton's 3rd Law - Answer-Every action has an equal and opposite reaction
Normal Force (Fn) - Answer-A contact force between force between two hard surfaces
Weight - Answer--Force of gravity on an object
-Depends on mass of object and strength of gravitational field
-Measured in Newtons (N)
Mass - Answer--How much stuff an object is made of
-Mass is independent of location of object
-Measured in kilograms (kg)
Static Friction (Fs) - Answer-Force that resists motion of two objects that are stationary
relative to one another
Fs (max) = Us x Fn
Kinetic Friction (Fk) - Answer-Friction when two objects slide against each other
Fk = Uk x Fn
Hooke's Law - Answer-Fs = kΔx, where k is the spring constant
Momentum (p) - Answer-p = mv
-Measured in kg x m/s
-momentum is conserved in collisions and explosions
Impulse (J) - Answer-J = Fnet Δt = Δp
-Measured in N x s
Elastic Collisions - Answer--Momentum and kinetic energy are conserved
-Can use equation v1(i) - v2(i) = v2(f) - v1(f)
Inelastic Collisions - Answer--Momentum is conserved BUT kinetic energy is not
conserved
-Collision is completely inelastic if objects stick together
Translational Kinetic Energy (K) - Answer--Energy of objects in motion
-Measured in joules
K = 1/2 mv^2
Gravitational Potential Energy (Ug) - Answer--Energy of an object based on its position
Correct Answers
Displacement (Δx) - Answer--Net change in position
-Measured in meters (m)
Δx = x(f) - x(i)
Velocity (v) - Answer--Speed and direction
-Measured in meters per second (m/s)
average v = Δx/t
Acceleration (a) - Answer--Rate of change of velocity w/ respect to time
-Measured in meters per second squared (m/s^2)
average a = Δv/t
Speeding up vs. Slowing Down - Answer--Speeding up occurs when velocity and
acceleration have the same sign
-Slowing down occurs when velocity and acceleration have opposite signs
Position vs. Time Graph - Answer--Slope represents average velocity
-Object changes direction when graph crosses x-axis
Velocity vs. Time Graph - Answer--Slope represents average acceleration
-Area represents displacement
Acceleration vs. Time Graph - Answer--Area represents change in velocity
Scalars - Answer-Quantities with only a size/magnitude (ex: speed, mass, length,
temperature, time, distance, energy, etc.)
Vectors - Answer-Quantities with both a size and direction (ex: displacement, velocity,
position, acceleration, force, etc.)
Projectile Motion - Answer--Horizontal and vertical components are independent of each
other
-Complementary angles travel same horizontal distance
-Larger angles travel higher and spend more time in air, while smaller angles have
greater horizontal velocities
Force (F) - Answer--A push or pull
-Measured in Newtons (N)
Newton's 1st Law - Answer-An object will move at a constant velocity in a frictionless,
airless vacuum unless another force is exerted on it
, Inertia - Answer--property of an object that resists a change in motion
-measured in mass
Newton's 2nd Law - Answer-Net force = mass x acceleration
Newton's 3rd Law - Answer-Every action has an equal and opposite reaction
Normal Force (Fn) - Answer-A contact force between force between two hard surfaces
Weight - Answer--Force of gravity on an object
-Depends on mass of object and strength of gravitational field
-Measured in Newtons (N)
Mass - Answer--How much stuff an object is made of
-Mass is independent of location of object
-Measured in kilograms (kg)
Static Friction (Fs) - Answer-Force that resists motion of two objects that are stationary
relative to one another
Fs (max) = Us x Fn
Kinetic Friction (Fk) - Answer-Friction when two objects slide against each other
Fk = Uk x Fn
Hooke's Law - Answer-Fs = kΔx, where k is the spring constant
Momentum (p) - Answer-p = mv
-Measured in kg x m/s
-momentum is conserved in collisions and explosions
Impulse (J) - Answer-J = Fnet Δt = Δp
-Measured in N x s
Elastic Collisions - Answer--Momentum and kinetic energy are conserved
-Can use equation v1(i) - v2(i) = v2(f) - v1(f)
Inelastic Collisions - Answer--Momentum is conserved BUT kinetic energy is not
conserved
-Collision is completely inelastic if objects stick together
Translational Kinetic Energy (K) - Answer--Energy of objects in motion
-Measured in joules
K = 1/2 mv^2
Gravitational Potential Energy (Ug) - Answer--Energy of an object based on its position
