TLF ID L7820
Observe the non-linear distance–time graph of a rocket travelling at a changing velocity. Calculate the average and instantaneous velocity of the rocket over different time intervals. Notice how as each time interval becomes smaller, the rocket's average velocity approaches its instantaneous velocity. Use the slider to change the points where the secant intersects the curve and observe the gradient calculator. Work out the relationship between average and instantaneous velocities and the gradients of secants and tangents. This learning object is one in a series of ten objects. Some objects in the series are also packaged as combined learning objects.