You studied the dependence of the range of the projectile on its initial speed.

Question

You studied the dependence of the range of the projectile on its initial speed. You settled on using 45 degrees for the fixed angle for which of the following reason(s)? (You can select more than one.)

The range at 45 degrees is the longest thus the relative uncertainty coming from the ruler is the smallest.

Higher angles in general are less sensitive to the height misalignment than the shallower angles

The slope of v2 vs. Range theoretical line is exactly g=9.8 m/s2 at 45degrees

45degrees has no error associated with the measurement of the angle

At 45 degrees the initial speed of the projectile is closest to the measured value of the initial speed

The maximum height of 45degrees trajectory is the tallest so we'll have a better quality mark left on the pressure paper allowing for a more precise determination of the range

The time of flight is longest for 45degrees trajectory so we'll have the most accurate measurement of the range

Explanation / Answer

The range at 45 degrees is the longest thus the relative uncertainty coming from the ruler is the smallest.

45degrees has no error associated with the measurement of the angle.

At 45 degrees the initial speed of the projectile is closest to the measured value of the initial speed.

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