A projectile is launched straight upward at 50 m/s. Neglecting air resistance its speed upon returning to its starting point is

A) less than 50 m/s.
B) 50 m/s.
C) more than 50 m/s.


Answer: B

Physics & Space Science

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Fill in the blank(s) with the appropriate word(s).

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How does Kepler's First Law refine the Copernican model greatly?

What will be an ideal response?

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