Understanding Acceleration and Graphs

The video tutorial explains how to determine acceleration from a velocity-time graph using examples from the Apollo 15 mission and an aircraft. It covers calculating acceleration due to gravity on the moon and average acceleration of an aircraft, emphasizing the importance of showing calculations to avoid losing marks. The tutorial also provides detailed guidance on interpreting graph values and units.

What year did the Apollo 15 mission land on the moon?

• 1975

• 1973

• 1969

• 1971

Why is it important to show your work when calculating acceleration from a graph?

• To avoid losing all marks if the calculation is wrong

• To save time during the exam

• To make the graph look more complex

• To confuse the examiner

What is the formula for calculating acceleration from a velocity-time graph?

• Acceleration = change in x / change in y

• Acceleration = change in y / change in x

• Acceleration = velocity / time

• Acceleration = time / velocity

What is the calculated acceleration due to gravity on the moon from the graph?

• 1.59 m/s²

• 9.81 m/s²

• 0.98 m/s²

• 2.00 m/s²

What does each small square on the velocity-time graph represent in terms of time?

• 0.2 seconds

• 0.1 seconds

• 0.02 seconds

• 0.01 seconds

What is the unit of acceleration as confirmed in the video?

• s/m²

• s/m

• m/s²

• m/s

What is the total change in velocity for the aircraft example?

• 60 m/s

• 70 m/s

• 80 m/s

• 78 m/s

How is average acceleration calculated from a velocity-time graph?

• Initial velocity divided by final velocity

• Final velocity divided by initial velocity

• Total time divided by total change in velocity

• Total change in velocity divided by total time

What is the average acceleration of the aircraft as calculated from the graph?

• 1.5 m/s²

• 2.0 m/s²

• 1.0 m/s²

• 1.3 m/s²

Why is calculating average acceleration often considered more difficult than normal acceleration?

• It involves understanding the entire graph

• It requires more complex math

• It is not covered in basic physics

• It needs more data points