part A: A particle moving at a velocity of 6.6 m/s in the positive x direction i

Question

part A: A particle moving at a velocity of 6.6 m/s in
the positive x direction is given an accelera-
tion of 4 m/s2 in the positive y direction for
1.7 s.
What is the final speed of the particle?
Answer in units of m/s.

Part B:
Some enterprising physics students working
on a catapult decide to have a water balloon
fight in the school hallway. The ceiling is of
height 3.4 m, and the balloons are launched
at a velocity of 10 m/s.
The acceleration of gravity is 9.8 m/s2 .
At what angle must they be launched to
just graze the ceiling?
Answer in units of ?.

Explanation / Answer

B) y = 3.4 m, v = 10 m/s, ay = -9.8 m/s2 find at y, vy = 0 0 = (vsin)2 + 2ayy = sin-1[(-2ayy) /v] =55o

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