Probeware affords measurement of acceleration at the cart's highest point after an upward push, permitting the fallacy that acceleration is zero there to be addressed¶

Claim · All claims
Evidence · 1 study · qualitative r2 · q1
Currency · newest study 2018 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q1 i? Unlike photogates and the tape timer, probeware allows study of motion up, down and at the turning point, making the zero-velocity/non-zero-acceleration distinction experimentally accessible. → Jonte Bernhard 2018

Evidence¶

Jonte Bernhard 2018¶

Jonte Bernhard. (2018). What matters for students' learning in the laboratory? Do not neglect the role of experimental equipment! Instructional Science. https://doi.org/10.1007/s11251-018-9469-x

q1 · i? · qualitative · r2

Affordance analysis of the probeware (MBL) lab, where a motion sensor displays position, velocity and acceleration in real time. It is as convenient to study motion up the incline as down, and graphs are presented simultaneously with the actual motion.

"the probeware technology allows measurement of the acceleration at the cart's highest point following an initial push upwards, thereby permitting the fallacy that acceleration is zero at this point to be addressed."

Discussion¶

Related Claims¶

• Students' courses of action differed by instrumentation: photogate and tape-timer groups centred on numbers and dots with motion concepts rare, while probeware groups centred on motion concepts — related
• Photogates do not determine the sign of velocity, cannot show zero velocity with non-zero acceleration at the turning point, and afford the Δv/Δx rather than the Δv/Δt definition of acceleration — reports the opposite
• The tape timer affords study of downward motion only, so the direction of acceleration and the acceleration at the turning point cannot be addressed — related
• What is possible for students to perceive or discern in a laboratory depends on the measurement technology used, even when the object of learning is the same — a broader claim this one bears on