IB Physics Mechanics: Acceleration-Time Graphs

What is the main focus of this lesson in physics?

• Acceleration time graphs

• Speed and velocity graphs

• Force and motion graphs

• Distance and displacement graphs

In the elevator example, what does a negative acceleration indicate?

• The elevator is slowing down

• The elevator is moving upwards

• The elevator is moving downwards

• The elevator is stationary

How is uniform acceleration represented on an acceleration time graph?

• As a horizontal line

• As a vertical line

• As a diagonal line

• As a curved line

What happens to Lotus's velocity when she moves at a constant speed on the escalator?

• It remains constant

• It becomes zero

• It decreases

• It increases

During Lotus's escalator ride, what does a region below the horizontal axis represent?

• Constant velocity

• Zero velocity

• Deceleration or negative acceleration

• Acceleration in the positive direction

What is the significance of the area between the acceleration time graph and the horizontal axis?

• It represents the object's speed

• It represents the object's position

• It represents the object's velocity

• It represents the object's change in velocity

In the train example, what does a positive area above the horizontal axis indicate?

• Decrease in velocity

• Increase in velocity

• Zero velocity

• Constant velocity

How is the average acceleration of an object calculated?

• By subtracting the initial velocity from the final velocity

• By adding the initial and final velocities

• By multiplying the change in velocity by the time taken

• By dividing the change in velocity by the time taken

In the water bottle rocket example, what does it mean when the areas above and below the horizontal axis cancel out?

• The rocket's velocity is zero

• The rocket is accelerating

• The rocket is decelerating

• The rocket is at its maximum height

What is the key learning goal of this lesson?

• To understand distance time graphs

• To describe the motion of objects using acceleration time graphs

• To calculate force and motion

• To analyze speed and velocity