Acceleration

The video tutorial explains the concept of acceleration using a car journey example, detailing how velocity changes over time. It introduces average acceleration and its mathematical expression, discusses velocity-time graphs, and explains different types of acceleration: positive, negative, and zero. The tutorial also covers instantaneous acceleration and how to calculate it using the slope of a tangent. Finally, it demonstrates how to find displacement from velocity-time graphs by calculating the area under the curve, using shapes like rectangles, triangles, and trapezoids.

What is the mathematical expression for average acceleration?

• a = v1 - v2 / t1 - t2

• a = v2 - v1 / t2 - t1

• a = v2 * v1 / t2 * t1

• a = v2 + v1 / t2 + t1

In a velocity-time graph, what does a horizontal line parallel to the x-axis indicate?

• Variable acceleration

• Negative acceleration

• Positive acceleration

• Zero acceleration

What is the term used for negative acceleration?

• Deceleration

• Acceleration

• Instantaneous velocity

• Constant velocity

How is instantaneous acceleration determined from a velocity-time graph?

• By averaging the initial and final velocities

• By measuring the distance between two points

• By calculating the slope of the tangent at a point

• By finding the area under the curve

What is the average acceleration if an object moves from 24 m/s to 0 m/s in 15 seconds?

• 1.6 m/s²

• -1.6 m/s²

• 0 m/s²

• -1.33 m/s²

In a velocity-time graph, what does the area under the curve represent?

• Time

• Displacement

• Acceleration

• Velocity

How is displacement calculated from a velocity-time graph with a trapezoid shape?

• 1/2 times base times height

• 1/2 times breadth times (height1 + height2)

• Base times height

• Length times breadth