Answer:
a. [tex]1.47N[/tex]
b. [tex]1.47N[/tex]
Explanation:
Given:
Mass of the baseball = [tex]0.150kg[/tex]
The initial velocity of the baseball = 20m/s
The force acting on the baseball is only due to gravity and the air resistance is negligible. The baseball acceleration is constant due to gravity.
According to Newton's second law:
[tex]F_{w} =mg[/tex]----------(1)
where mass of the baseball [tex]m = 0.150kg
And acceleration due to gravity [tex]g = 9.8m/s^{2}[/tex]
Put all the value in equation 1.
[tex]F_{w} =0.150\times -9.8[/tex]
[tex]F_{w} =-1.47N[/tex]
Therefore, the force on the ball when it reaches half of its maximum height is [tex]1.47N[/tex].
Similarly, the force acting on the ball when its peak [tex]1.47N[/tex].
