Physics- Chapter 4 Test Review

Front

What is the acceleration of an object in free fall when air resistance is negligible?

Back

9.81 m/s², regardless of its mass.

Front

State Newton's second law of motion.

Back

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 does a negative acceleration indicate about an object's motion?

Back

The object is slowing down.

Front

How do you calculate the distance traveled by an object under constant acceleration?

Back

Use the formula: d = vi*t + 0.5*a*t², where vi is the initial velocity, a is the acceleration, and t is the time.

Front

What is the relationship between velocity and time in a velocity versus time graph?

Back

The slope of the graph represents acceleration.

Front

Define terminal velocity.

Back

The constant speed an object reaches when the force of gravity is balanced by the drag force of the medium through which it is falling.

Front

What does it mean when an object has a constant velocity?

Back

The object is moving at the same speed and in the same direction without changing.

Front

Explain the concept of free fall.

Back

Free fall occurs when the only force acting on an object is gravity.

Front

What is the significance of the area under a velocity versus time graph?

Back

It represents the displacement of the object.

Front

How can you determine if an object is accelerating from a position versus time graph?

Back

If the graph is curved, the object is accelerating.