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Friction
Investigation 2
Investigation 2
Friction
Phase 1 – Defined Understanding
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Teacher PreLab
Prepare for the Experiment
Phase 2 – Dynamic Understanding
► Investigation Two Summary – Lab Goals
In Investigation Two, you tested the influence of velocity on a frictional force. During this Investigation, you:
1. Measure the force required to pull the wood block 50 cm in the following time segments:
- 2 s
- 4 s
- 6 s
- 8 s
2. Calculate the average velocity for each trial using the following formula:
► Investigation Two Summary – Learning Goals
Through these experiments, students will conclude that:
1. Frictional force is independent of velocity. This was shown on the graph where frictional force remained constant regardless of the change in velocity.
Launch Concept Slides/Annotations
Mathematics Concepts in This Investigation
- predict/verify results
- length/distance in cm
- measuring force using a spring scale
- calculate velocity
- division
- metric conversion
- data table
- time in seconds
- decimals to the nearest tenth and hundredth
- line graph
- patterns/trends
- skip counting by 0.05
- (in)dependent variables
- data analysis