Item FM068003: Use of tables of speed versus time, and information about the speed of an object, to determine the forces acting on the object at various times.

The table below gives the speed of an object every minute from 9:00 am to 9:06 am.

Time → 9:00 am 9:01 am 9:02 am 9:03 am 9:04 am 9:05 am 9:06 am
Speed → 10 m/s 10 m/s 10 m/s 10 m/s 11 m/s 12 m/s 13 m/s

Which of the following sets of forces could cause this motion?

  1. From 9:00 am to 9:03 am, there is a single force of constant strength acting on the object. From 9:03 am to 9:06 am, there are no forces acting on the object.
  2. From 9:00 am to 9:03 am, there are no forces acting on the object. From 9:03 am to 9:06 am, there is a single force of constant strength acting on the object.
  3. From 9:00 am to 9:03 am, there is a single force of constant strength acting on the object. From 9:03 am to 9:06 am, there is a single force of increasing strength acting on the object.
  4. From 9:00 am to 9:03 am, there is a single force of constant strength acting on the object. From 9:03 am to 9:06 am, there is another constant force of greater strength acting on the object.

Statistics for this item are available in the Original Project.