When an archer shoots an arrow straight up with an initial velocity magnitude of 100.0 MS. After 5.00 s the velocity is 51.0 m/s. At what rate is the arrow decelerated?

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Question: When an archer shoots an arrow straight up with an initial velocity magnitude of 100.0 m/s. After 5.00 s the velocity is 51.0 m/s. At what rate is the arrow decelerated?

Answer:
Given data:
Initial velocity of the arrow (u) = 100 m/s,
Travelling time (t) = 5 seconds,
Final velocity of the arrow (v) = 51 m/s

According to the equation of the constant acceleration, acceleration can be written as,
 

Thus, the acceleration of the arrow is 9.8 m/s.

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