Physics Final: proportional reasoning

Front

What is the acceleration of a projectile along the Y axis?

Back

The acceleration is -g, where g is the acceleration due to gravity.

Front

What is the acceleration of an object when the net external force is zero?

Back

The acceleration is zero.

Front

What is torque?

Back

Torque is a measure of the rotational force applied to an object, calculated as the product of force and the distance from the pivot point.

Front

What is the principle of superposition in vector addition?

Back

The principle of superposition states that the resultant vector is the vector sum of all individual vectors.

Front

How do you determine the direction of torque?

Back

The direction of torque is determined by the right-hand rule: curl your fingers in the direction of rotation, and your thumb points in the direction of the torque.

Front

What are significant digits?

Back

Significant digits are the digits in a number that contribute to its precision, including all non-zero digits, zeros between significant digits, and trailing zeros in the decimal portion.

Front

What is the formula for calculating the resultant of two vectors?

Back

The resultant vector R can be calculated using R = √(A² + B² + 2ABcosθ), where A and B are the magnitudes of the vectors and θ is the angle between them.

Front

What is the difference between scalar and vector quantities?

Back

Scalar quantities have only magnitude (e.g., mass, temperature), while vector quantities have both magnitude and direction (e.g., velocity, force).

Front

What is the concept of equilibrium in physics?

Back

An object is in equilibrium when the net force and net torque acting on it are both zero.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law, F = ma, where F is the net force, m is the mass, and a is the acceleration.