Physics Kinematics: Motion in a Straight Line - Speed-Time and Velocity-Time Graphs

The video covers Module 1 Kinematics, focusing on motion in a straight line. It explains speed time and velocity time graphs, highlighting their differences and uses. Through a narrative involving Vector Man, the video illustrates concepts like acceleration, displacement, and velocity. It also distinguishes between average and instantaneous velocity, providing practical examples and a sample question to reinforce learning.

What is the primary limitation of speed-time graphs in physics?

• They do not show time intervals.

• They cannot be used to calculate displacement or acceleration.

• They cannot show negative speed.

• They are difficult to interpret.

In a velocity-time graph, what does a negative gradient indicate?

• Positive acceleration

• Negative acceleration

• Zero velocity

• Constant velocity

How is displacement determined from a velocity-time graph?

• By measuring the height of the graph

• By finding the slope of the graph

• By calculating the area between the graph and the horizontal axis

• By counting the number of peaks

What does a horizontal line on a velocity-time graph represent?

• The object is accelerating.

• The object is decelerating.

• The object is moving at a constant velocity.

• The object is stationary.

In the context of the narrative, what is the significance of the negative area on a velocity-time graph?

• It represents motion in the opposite direction.

• It signifies a loss of energy.

• It shows a decrease in time.

• It indicates a change in speed.

What is the formula for calculating the area of a trapezium, as used in velocity-time graph analysis?

• Length times width

• Half the sum of parallel sides times height

• Base times height divided by two

• Base times height

How can you determine acceleration from a velocity-time graph?

• By calculating the gradient of the graph

• By counting the number of peaks

• By finding the area under the graph

• By measuring the height of the graph

What does a curved line on a velocity-time graph indicate?

• Uniform acceleration

• Nonuniform acceleration

• Constant velocity

• Zero acceleration

What is the difference between average velocity and instantaneous velocity?

• Instantaneous velocity is always higher than average velocity.

• Average velocity is the total displacement divided by total time, while instantaneous velocity is the velocity at a specific moment.

• They are the same when the object moves at constant speed.

• Average velocity is always higher than instantaneous velocity.

In the sample question, what is the total displacement of the toy car after 0.9 seconds?

• 0.24 meters down the incline

• 0.06 meters up the incline

• 0.3 meters up the incline

• 0.06 meters down the incline