a) A football player tests his vertical jump by jumping straight up a distance o

Question

a) A football player tests his vertical jump by jumping straight up a distance of 47.5 inches. What was the player's initial velocity in meters per second?
m/s
b) What is the player's final velocity at the highest point?
m/s
c) What is the player's acceleration at the highest point?
m/s2
d) Which direction is the acceleration when the player is moving upward?

upward ?downward ? zero (no direction)?

e) Which direction is the acceleration at the highest point?

upward? downward ? zero (no direction)?

Explanation / Answer

Vertical distance travelled, s = 47.5 inches = (47.5 * 0.0254) m = 1.2065 m

a) v2 = u2 + 2as => 02 = u2 + 2* (-9.8) * 1.2065 => u = 4.86 m/s

b) Final velocity, v = 0

c) a = g = -9.8 m/s2

d) downward. Gravity pulls towards the ground.

e) downward. Acceleration will be same throughout.

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