Question

A ball is thrown from a point 6 metres above the ground.

The graph shows the height of the ball above the ground in metres.

Estimate the speed of the ball, in m/s, after 1 second. You must show your working.

Answer 1

Given:

A ball is thrown from a point 6 metres above the ground.

The graph shows the height of the ball above the ground in metres.

To find:

Estimate the speed of the ball, in m/s, after 1 second.

Solution:

Consider the attached figure while going through the following steps.

Draw the lines perpendicular to both x-axis and y-axis from 0 s to 1 s, as we do while finding the scope of a graph.

So, for the given, we get, y - coordinate value to be 1.4 m and x - coordinate value to be 1 s.

Therefore, the speed of the ball = distance / time = 1.4 m / 1 s = 1.4 m/s