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A projectile is launched with an initial speed of 40 m/s at an angle of 20 degree above the horizontal on flat ground. Ignore air friction.
(a) Find the projectile velocity at highest point of its trajectory?
m/s
(b) Now assume the projectile instead lands on a hillside 6.0 second after launch. Find what is the straight-line distance from where the projectile was launched to where it hits? (Note that the hill might slope down or up from the launch point.)
m
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