Answer:
A
Explanation:
or else u would get a muscle pull
Force is mass into acceleration
and pressure is force applied per unit area.
Answer:
(a)
vf_1s = 5.19 m/s
h_1s = 10.095 m
vf_4s = 24.23 m/s
h_4s = 4.49 m (below railing)
(b)
vi = 9.9 m/s
(c)
t = 1.53 s
h = 34.41 m
Explanation:
(c)
First, we will use the 1st equation of motion to find the time to attain the highest point:
where,
t = time to attain maximum height = ?
vf = final velocity = 0 m/s (ball momentarily stops at highest point
vi = initial velocity = 15 m/s
g = - 9.81 m/s (for upward motion)
<u>t = 1.53 s</u>
Now, for the height attained we will use the 2nd equation of motion:
<u>h = 34.41 m</u>
(b)
using the 3rd equation of motion for a height of 5 m:
<u>vi = 9.9 m/s</u>
<u></u>
(c)
At t = 1 s:
<u>vf_1s = 5.19 m/s</u>
<u></u><u></u>
<u>h_1s = 10.095 m</u>
<u></u>
At t = 4 s:
Since the ball covers the maximum height of 34.41 m in 1.53 s and then starts moving downward.
Therefore for the remaining 4 s - 1.53 s = 2.47 s, the initial velocity will be 0 m/s at the highest point and the value of g will be positive due to downward motion.
<u>vf_4s = 24.23 m/s</u>
<u></u><u></u>
now, for the position with respect to railing:
<u>h_4s = 4.49 m (below railing)</u>
<u></u>
Well rehabilitation is one way. They could also be imprisoned before anything happens. Hope this helps!