Understanding Acceleration Concepts

Mr. Mitchell explains acceleration and deceleration, defining acceleration as the change in velocity per unit time. He introduces the acceleration equation, a = (V - U) / T, and clarifies the units of measurement. A simulation with cars demonstrates acceleration, showing how different cars reach 60 MPH in varying times. The video concludes with a discussion on deceleration, emphasizing that negative acceleration indicates slowing down.

What is the definition of acceleration?

• The change in velocity per unit time

• The change in distance per unit time

• The change in speed per unit time

• The change in direction per unit time

Which of the following is a vector quantity?

• Time

• Acceleration

• Distance

• Speed

In the formula a = (V - U) / T, what does 'U' represent?

• Final velocity

• Acceleration

• Initial velocity

• Time

How can you remember the difference between initial and final velocity?

• V is always larger than U

• U comes after V in the alphabet

• U is always larger than V

• U comes before V in the alphabet

What does a positive acceleration value indicate?

• The object is stationary

• The object is speeding up

• The object is moving in reverse

• The object is slowing down

What does an acceleration of 5 m/s² mean?

• The object's speed increases by 5 m/s every second

• The object's speed decreases by 5 m/s every second

• The object's speed remains constant

• The object's speed increases by 5 m/s every minute

In the car simulation, which car had the greatest acceleration?

• Porsche

• Ferrari

• McLaren

• All had the same acceleration

How is acceleration calculated in the car simulation example?

• By dividing the final speed by the time taken

• By dividing the change in speed by the time taken

• By multiplying the final speed by the time taken

• By subtracting the initial speed from the final speed

What does a negative acceleration value indicate?

• The object is speeding up

• The object is slowing down

• The object is moving in a straight line

• The object is changing direction

Why is it important to state a direction with acceleration?

• Because direction is irrelevant

• Because direction affects speed

• Because acceleration is a vector quantity

• Because acceleration is a scalar quantity