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# Hi I need an explanation for why #3 is c.

1.
Which of the following correctly ranks the magnitude of the average acceleration of the cart during the four
sections of the graph?
(A) acd &gt; aAB &gt; aBC &gt; aDE
( B ) aBC &gt; QAB &gt; acD &gt; aDE
( C ) aAB &gt; ABC &gt;&quot; aDE &gt; acD
( D ) a CD &gt; QAB &gt; ADE &gt; ABC Slope
2. For which segment does the cart move the greatest distance?
(A) AB
(B) BC
longest +(x ,
(C) CD
(D) DE
AX = Vxot + = axt
10 m
3 m
3. A target lies flat on the ground 3 m from the side of a building that is 10 m tall, as shown above. A student
rolls a ball off the horizontal roof of the building in the direction of the target. Air resistance is negligible. The
horizontal speed with which the ball must leave the roof if it is to strike the target is most nearly
The velocity of a projectile at launch has a horizontal component vn and a vertical component vv. Air resistance
is negligible. When the projectile is at the highest point of its trajectory, which of the following shows the
vertical and horizontal components of its velocity and the vertical component of its acceleration?
Vertical
Horizontal
Vertical
Velocity
Velocity
Acceleration
( A)
(B)
50 5

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