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nathaliapachon1254
26.09.2019 •
Physics
Acannon sends a projectile towards a target a distance 1420 m away. the initial velocity makes an angle 35◦ with the horizontal. the target is hit. the acceleration of gravity is 9.8 m/s2 . what is the magnitude of the initial veloc- ity?
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Ответ:
Explanation:
From the exercise we know the final x distance, the angle which the projectile is being released and acceleration of gravity
From the equation of x-position we know that
Solving for![v_{o}](/tpl/images/0265/1305/f6cdf.png)
Now, if we analyze the equation of y-position we got
At the end of the motion y=0
Knowing the equation for
in (1)
Solving for t
Now, we can solve (1)
Ответ:
121.7 m/s
Explanation:
Horizontal range, R = 1420 m
Angle of projection, θ = 35°
acceleration due to gravity, g = 9.8 m/s^2
let u be the velocity of projection.
Use the formula for horizontal range
u = 121.7 m/s
Thus, the velocity of projection is 121.7 m/s.
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