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kaylailkanic1487
20.10.2019 •
Physics
Abatter hits a ball at 35 degrees above the horizontal and it is caught 4 seconds later 100 meters from home plate. what is the initial velocity (vector) of the ball?
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Ответ:
Explanation:
The range of a projectile is given by the formula
where in this case, we have
d = 100 m is the range
u is the initial speed (the magnitude of the initial velocity)
g = 9.8 m/s^2 is the acceleration of gravity
Solving for u, we find:
Now we can easily find the components of the initial velocity:
So, the initial velocity of the ball is
where i and j are the unit vector indicating the horizontal and vertical direction.
Ответ:
a(3, -2) and b(9, -12)
a(5, 4) and b(7, 2)
a(2, 9) and b(-4, 3)
a(-4, 5) and b(8, 9)
a(2, 4) and b(-8, 6)
a(4, 10) and b(8, 12)
Step-by-step explanation: