Linear model fit
Force F (N): 1,2,3,4. Acceleration a (m/s^2): 0.48,1.02,1.49,2.01. A fit gives F=(1.99 kg)a+0.03 N, R^2=0.999.
- Slope in F versus a has units kg.
- Intercept is near zero.
- High R^2 supports linearity, not perfect truth.
uncertainty, graphing, model fit, and defense
Force F (N): 1,2,3,4. Acceleration a (m/s^2): 0.48,1.02,1.49,2.01. A fit gives F=(1.99 kg)a+0.03 N, R^2=0.999.
Pause. Find what matters. Then make your move.