Physics Semester Exam 24-25

Front

What happens to the gravitational force between two objects when the distance between them increases?

Back

The gravitational force decreases according to the inverse square law. If the distance increases by a factor of 4, the force decreases to one-sixteenth of its original value.

Front

What does a position vs. time graph represent?

Back

A position vs. time graph shows how the position of an object changes over time. The slope of the graph indicates the velocity of the object.

Front

How can you determine the greatest velocity from a position vs. time graph?

Back

The greatest velocity corresponds to the steepest slope on the graph. Look for the section where the graph rises the fastest.

Front

What is the relationship between speed and the observer's frame of reference?

Back

An object's speed can appear different depending on the observer's motion. For example, if Avi walks away from her desk, she appears to move faster relative to a stationary observer.

Front

What type of graph represents the displacement of an object in free fall?

Back

The displacement vs. time graph for an object in free fall is parabolic, indicating that displacement increases with the square of time.

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 the formula for gravitational force?

Back

The gravitational force (F) between two masses (m1 and m2) is given by F = G * (m1 * m2) / r^2, where G is the gravitational constant and r is the distance between the centers of the two masses.

Front

What does a constant velocity indicate on a velocity vs. time graph?

Back

A constant velocity is represented by a horizontal line on a velocity vs. time graph, indicating that the object's speed does not change over time.

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

How does air resistance affect the motion of falling objects?

Back

Air resistance opposes the motion of falling objects, reducing their acceleration and terminal velocity compared to free fall in a vacuum.