Resolving using F = ma [Hinge Questions]

This question is for checking students understanding of resolving forces using Newton’s Second Law F = ma

MEch hingw forces slope_1

Breakdown:
a) Student has misunderstood how to use the parity of the force components.
b) Correct solution
c) Student has used the incorrect component of the weight force
d) The student has assumed equilibrium rather than acceleration.
e) The student has not split the weight force into components; does not understand that only parallel components are considered
f) The student has not understood that perpendicular forces have no effect on the resolution.

More to follow soon I hope!

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This entry was posted in Classroom, General Maths Thoughts, Hinge Questions, Lessons, Pedagogy and tagged , , , , , . Bookmark the permalink.

2 Responses to Resolving using F = ma [Hinge Questions]

  1. peternewbury says:

    Great post. I do a lot of work helping university instructors use peer instruction (“clickers”) in their classes. Sure, there are technical things to learn and best practices for running peer instruction, but its success comes from a good question. When I help instructors create these multiple-choice questions, I stress the importance of the incorrect choices – each answer should let the instructor diagnose what/how the students are thinking. That way, the instructor can immediately address the mistaken or incomplete understanding. Just like your hinge questions!

    • nik_d_maths says:

      Hi Peter, thanks for the comment – I fully agree that the questions we ask are hugely important – I find it so frustrating when I look at student responses and all I can tell is that they weren’t right. Part of the difficultly and satisfaction of teaching for me at the moment is trying to find the right questions.

      I’m interested by what you mena by ‘clickers’ when running peer instruction?

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