AP Physics C Kinematics & Forces

Front

What is momentum in physics?

Back

Momentum (p) is the product of an object's mass (m) and its velocity (v), expressed as p = mv. It is a vector quantity, having both magnitude and direction.

Front

How is force related to momentum?

Back

Force (F) is the rate of change of momentum over time, expressed as F = dp/dt. For an object with momentum p = kt^3, the force is F = 3kt^2.

Front

What is the equation for position as a function of time?

Back

The position of an object can be expressed as a function of time, such as x(t) = t^3 - 6t^2 + 9t, where x is position in meters and t is time in seconds.

Front

How do you determine when the net force on an object is zero?

Back

The net force on an object is zero when its acceleration is zero, which can be found by setting the derivative of the position function to zero.

Front

What is the significance of the coefficient of friction?

Back

The coefficient of friction (µ) quantifies the frictional force between two surfaces. For a skier on a slope, µ = tan(ϕ) when sliding at constant speed.

Front

What is the resistive force acting on a falling object?

Back

The resistive force acting on a falling object can be modeled as kv, where k is a constant and v is the speed of the object.

Front

What is the relationship between velocity and acceleration?

Back

Acceleration (a) is the rate of change of velocity (v) over time, expressed as a = dv/dt.

Front

What is the formula for calculating gravitational force?

Back

The gravitational force (F_g) acting on an object is given by F_g = mg, where m is the mass of the object and g is the acceleration due to gravity.

Front

How do you calculate the net force acting on an object?

Back

The net force (F_net) acting on an object is the vector sum of all individual forces acting on it, expressed as F_net = F1 + F2 + ... + Fn.

Front

What is the concept of free fall?

Back

Free fall is the motion of an object under the influence of gravitational force only, with no other forces acting on it.