Lesson 2: Understanding Acceleration

What is the definition of acceleration?

• Acceleration is the speed of an object at a given moment.

• Acceleration is the distance traveled over time.

• Acceleration is the force applied to an object.

• Acceleration is the rate of change of velocity over time.

What are the different types of acceleration?

• Uniform, Non-uniform, Linear, Angular, Centripetal

• Constant, Variable, Rotational

• Centrifugal, Gravitational, Magnetic

• Instantaneous, Average, Relative

How does acceleration affect an object in free fall?

• Acceleration due to gravity causes the object's velocity to increase continuously while in free fall.

• Acceleration decreases the object's velocity in free fall.

• Acceleration has no effect on the object's motion during free fall.

• Acceleration causes the object to float instead of fall.

What is the formula for calculating average acceleration?

• average acceleration = (v_i - v_f) * t

• average acceleration = v_f + v_i

• average acceleration = v_f / t

• average acceleration = (v_f - v_i) / t

If a car speeds up from 20 m/s to 50 m/s in 5 seconds, what is its average acceleration?

• 4 m/s²

• 8 m/s²

• 6 m/s²

• 10 m/s²

What is the significance of a negative acceleration value?

• Negative acceleration is irrelevant to motion.

• Negative acceleration indicates an increase in speed.

• Negative acceleration signifies deceleration or a reduction in speed.

• Negative acceleration means the object is at rest.

How can you represent acceleration on a graph?

• Display acceleration as a bar graph with speed on the x-axis.

• Plot acceleration on the x-axis and distance on the y-axis.

• Use a pie chart to represent acceleration over time.

• Plot acceleration on the y-axis and time on the x-axis.

What does a horizontal line on an acceleration vs. time graph indicate?

• The object is at rest.

• The acceleration is increasing.

• The acceleration is negative.

• The acceleration is constant.

In free fall, what is the acceleration experienced by an object near the Earth's surface?

• 4.9 m/s²

• 9.81 m/s²

• 15.0 m/s²

• 0 m/s²

How does air resistance affect the acceleration of a falling object?

• Air resistance decreases the acceleration of a falling object until it reaches terminal velocity.

• Air resistance causes a falling object to accelerate indefinitely.

• Air resistance has no effect on the acceleration of a falling object.

• Air resistance increases the acceleration of a falling object.