Physics A Exam Fall 2024

Front

What is a fundamental unit in the SI system?

Back

A fundamental unit in the SI system is a basic measurement unit that is defined independently of other units. Examples include meter (length), kilogram (mass), and second (time).

Front

What is the applied force?

Back

The applied force is the force that is applied to an object by a person or another object. It is one of the forces acting on an object in motion.

Front

What are the two components of projectile motion?

Back

The two components of projectile motion are horizontal motion and vertical motion. These components can be analyzed separately to understand the overall motion.

Front

How do you calculate the resultant motion of a boat moving south at 5 mph and paddled east at 5 mph?

Back

The resultant motion is calculated using the Pythagorean theorem, which states that the resultant velocity is the square root of the sum of the squares of the individual velocities.

Front

How do you calculate 12.47 m ÷ 3.2 s with the correct number of significant figures?

Back

The calculation gives 3.9 m/s, rounded to two significant figures based on the least precise measurement (3.2 s).

Front

What is the definition of velocity?

Back

Velocity is the speed of an object in a specific direction. It is a vector quantity, meaning it has both magnitude and direction.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that the total momentum of a closed system remains constant if no external forces act on it.

Front

What is Newton's second law of motion?

Back

Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is the formula for kinetic energy?

Back

The formula for kinetic energy (KE) is KE = 1/2 mv², where m is mass and v is velocity.