Lithium is a metal with an oxidation number of one and oxygen is a nonmetal with an oxidation number of to which chemical formul
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A. 2.48 m, see attached photo for steps
Answer:u=31.02 m/s
Explanation:
Given
launch angle of ball
Range of ball
considering ball to be a Projectile
Range of Projectile is given by
Where
Height after ts seconds is given by the expression
Taking derivative with respect to time
This is the value of velocity after time t seconds, negative sign means velocity is towards downward direction.
v = 9.8t
After 7 seconds, v = 9.8*7 = 68.6 m/s
Speed after 7 seconds after it is dropped = 68.6 m/s