The table shows how the speed of a car changed during a section of a journey. Speed (in m/s) 0 9 18 27 27 27 Time (in seconds) 0 10 20 30 40 50 Draw a speed time graph to represent this data.

Speed/ velocity time graph for data given in shown above. Slope of velocity time graph represents acceleration. Area under speed time graph represents distance covered.

The table shows how the speed of a car changed during a section of a journey. Speed (in m/s) 0 9 18 27 27 27 Time (in seconds) 0 10 20 30 40 50 Draw a speed time graph to represent this data. Also calculate acceleration during first thirty seconds of the journey.

Speed/ velocity time graph for data given in shown above. Slope of velocity time graph represents acceleration. Area under velocity time graph represents distance covered. Acceleration can be calculated by taking any two coordinate points from graph until 30 seconds. Let it be ( 30 , 27 ) and ( 0 , 0 ) . a = 27 - 0 30 - 0 = 9 10 = 0 . 9 m / s 2 Hence, acceleration for first 30 seconds is 0 . 9 m / s 2 .

The table shows how the speed of a car changed during a section of a journey. Speed (in m/s) 0 9 18 27 27 27 Time (in seconds) 0 10 20 30 40 50 Draw a speed time graph to represent this data. Also calculate distance travelled during entire journey.

Speed-time graph for data given in shown above. Slope of velocity time graph represents acceleration. Area under speed time graph represents distance covered. Shape of graph is like a trapezium. Area of trapezium will be equal to distance travelled. Area of trapezium = 1 2 × ( Sum of parallel sides ) × height Area of trapezium = 1 2 × ( O C + A B ) × B C = 1 2 × ( 50 + 20 ) × 27 = 945 Hence, distance travelled is 945 m .

The graph shows how a car's speed changed as it travelled along. In which section(s) was its acceleration zero?

Acceleration is rate of change of velocity. Also, slope of velocity time graph represents acceleration. Whenever graph is a straight line parallel to x-axis, slope is zero of that part. From the graph, slope is zero in section B and section D. Hence, acceleration is zero in sections B and D.

The graph shows how a car's speed changed as it travelled along. In which section(s) was its acceleration constant?

Acceleration is rate of change of velocity. Also, slope of velocity time graph represents acceleration. Whenever graph is a straight line parallel to x-axis, slope is zero of that part. When graph is straight line, but is not parallel to any of the axes, acceleration is constant for that portion. From the graph, slope is positive in section A and negative in section E. In section C, graph is not a straight line. Hence, acceleration is constant in Section A.

The graph shows how a car's speed changed as it travelled along. What can you say about acceleration of section E.

Acceleration is rate of change of velocity. Also, slope of velocity time graph represents acceleration. Whenever graph is a straight line parallel to x-axis, slope is zero of that part. When graph is straight line, but is not parallel to any of the axes, acceleration is constant for that portion. From the graph, slope is positive in section A and negative in section E. In section E, velocity is decreasing. It means there is retardation or negative acceleration in section E.