Projectile Motion: A boy kicks a football with an initial velocity of 20 m/s at an angle of 25° above the horizontal. If we neglect air resistance, the magnitude of the acceleration of the ball while it is in flight is
A. 25 m/s2.
B. 18 m/s2.
C. 9.8 m/s2.
D. 8.5 m/s2.
E. 0 m/s2.
Answer: C
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