Physics Midterm Review

Front

What is average velocity?

Back

Average velocity is the total displacement divided by the total time taken. It is a vector quantity, meaning it has both magnitude and direction.

Front

What is the difference between scalar and vector quantities?

Back

A scalar quantity has only magnitude (e.g., speed), while a vector quantity has both magnitude and direction (e.g., velocity).

Front

Calculate the average velocity of an object that travels 20 m to the east in 5 seconds.

Back

Average velocity = Displacement / Time = 20 m / 5 s = 4 m/s to the east.

Front

What is displacement?

Back

Displacement is the shortest distance from the initial to the final position of an object, along with the direction.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It can be positive (speeding up) or negative (slowing down).

Front

Calculate the final velocity of an object that starts from rest and accelerates at 3 m/s² for 5 seconds.

Back

Final velocity = Initial velocity + (Acceleration × Time) = 0 + (3 m/s² × 5 s) = 15 m/s.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) = (Final velocity (v) - Initial velocity (u)) / Time (t).

Front

What does it mean when an object is in free fall?

Back

An object in free fall is only under the influence of gravity, with no other forces acting on it.

Front

What is the formula for calculating distance traveled under constant acceleration?

Back

Distance (d) = Initial velocity (u) × Time (t) + 0.5 × Acceleration (a) × Time² (t²).

Front

What is the significance of Newton's second law of motion?

Back

Newton's second law states that Force (F) = Mass (m) × Acceleration (a). It explains how the velocity of an object changes when it is subjected to an external force.