Physics 2024 Fall Semester Exam

Front

What is velocity?

Back

Velocity is the rate of change of displacement of an object. It is a vector quantity, which means 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 includes both speed and direction.

Front

Define distance in physics.

Back

Distance is a scalar quantity that represents the total path length traveled by an object, regardless of direction.

Front

Define displacement in physics.

Back

Displacement is a vector quantity that refers to the change in position of an object, measured as the shortest distance from the initial to the final position.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) is calculated using the formula: a = (final velocity - initial velocity) / time.

Front

What is the unit of acceleration?

Back

The unit of acceleration is meters per second squared (m/s²).

Front

What type of work does friction do on an object in motion?

Back

Friction does negative work on an object in motion, as it opposes the direction of motion.

Front

If an object travels 500 m in one direction and then returns to the starting point, what is its displacement?

Back

The displacement is 0 m, as the initial and final positions are the same.

Front

How do you convert milligrams to grams?

Back

To convert milligrams to grams, divide the number of milligrams by 1000 (1 g = 1000 mg).

Front

What is kinetic energy (KE)?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity.