The figure is posted below the question, and the answer ticked is incorrect so i

Question

The figure is posted below the question, and the answer ticked is incorrect so it can only be b, c, or d.

Question 3 Use figure 6.3 on page 45 to answer the following question. Does the change in the initial velocity change the length of time the projectile stays in flight? Explain. o a. Yes, because the flight time depends solely on the initial velocity of the projectile. O b. Yes, because the flight time depends solely on the angle of the plank. O c. No, because the flight time solely depends on the height of the table and the value of gravity O d. No, because the flight time solely depends on the x-displacement.

Explanation / Answer

along vertical

initial velocity voy = 0

displacement = -y

acceleration ay = -g

time of flight = t

from equation of motion

dy = voy*t + (1/2)*ay*t^2

-y = 0 -(1/2)*g*t^2

t = sqrt(2y/g)

time of flight depends on y

time of flight does not depend on vx

OPTION (c) <<<<--------------ANSWER

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