You are attempting a long jump. You leave the takeoff board with a vertical velo

ID: 2101711 • Letter: Y

Question

You are attempting a long jump. You leave the takeoff board with a vertical velocity of 4 m/s and a horizontal velocity of 8 m/s.

a. What is your horizontal velocity just before you land? ____________

b. If you are in the air of 0.85 s, what is your horizontal displacement during this time in the air? __________

c. What is your vertical velocity at the end of the 0.85 s flight? _____________

d. If your COG was 1.0 m high at the instant of takeoff, how high will it be at the peak of your flight? ____________

Part A)

Horizontal velocity does not change, so its still 8 m/s

Part B)

d = vt

d =(8)(.85) = 6.8 m

Part C)

Vertical velocity is -4m/s (The negative is becuase you are coming back downward)

Part D)

d = vot + .5at^2

d = (4)(.425) + (.5)(-9.8)(.425)^2 + 1

d = 1.81 m

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