Review estimating results in Edexcel A-Level Physics through parameter changes, measurement improvements and qualitative energy-output judgements.
A student investigated the bending of a plastic beam.
The beam, of width w and height h, was supported at either end by two metal rods a distance l apart, as shown.
She applied a force F to the middle of the plastic beam by hanging a mass from it.
The beam bent downwards as shown.
She measured the vertical distance d moved by the middle of the plastic beam and repeated this measurement for increasing values of F.
She recorded her results in a table, as shown.
The student’s teacher suggested that using a plastic beam with a smaller value of h would improve the measurement of d.
Justify the teacher’s statement.