## 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.
Distribution of Responses
Students Responding Correctly
Group Correct Total Percent
Overall 404 1780 23%
6–8 267 1114 24%
9–12 135 658 21%
Gender
Male17982422%
Female21491024%
Primary Language
English354156723%
Other4417825%