These are “plug-in-the-number” type activities to familiarize yon with the equations that link the concepts of physics. They are mainly one-step substitutions and are less challenging than the Problem. ? Calculate the speed of a bowling ball that travels 4 meters in 2 seconds. ?
Solution 2PC Introduction Speed of an object, v = distance travelled / time Step 1 In the provided question, they have asked to calculate the speed of a ball that travels 4 metres in seconds. So, according to our equation, the distance travelled by the ball = 4 metres. The time take for the travel = 2 seconds Substituting these values in the equation Speed of the ball, v = 4 metres / 2 seconds = metres/ second It means that, the ball will travel 2 metres in each second according to its motion. The unit should be clear and it can be represented as 2 m/s instead of writing 2 metres/second Conclusion First we need the correct equation. Then do the numerical calculation according to the equation and do not forget to put the units.