There exist a attractive force called nuclear force due to whixh nucleus is held together.It acts only to a very small distance
Answer:
<h2>a)
The base baseball was in air for 0.64 seconds.</h2><h2>
b) Speed of throwing is 32.89 m/s</h2>
Explanation:
a)Consider the vertical motion of baseball
We have equation of motion s = ut + 0.5 at²
Initial velocity, u = 0 m/s
Acceleration, a = 9.81 m/s²
Time, t = ?
Displacement, s = 2 m
Substituting
s = ut + 0.5 at²
2 = 0 x t + 0.5 x 9.81 x t²
t = 0.64 seconds
The base baseball was in air for 0.64 seconds.
b)Consider the horizontal motion of baseball
We have equation of motion s = ut + 0.5 at²
Initial velocity, u = ?
Acceleration, a = 0 m/s²
Time, t = 0.64 s
Displacement, s= 21 m
Substituting
s = ut + 0.5 at²
21 = u x 0.64 + 0.5 x 0 x 0.64²
u = 32.89 m/s
Speed of throwing is 32.89 m/s
