Question #258803

You throw a ball vertically upward from the roof of a tall building. The ball leaves your hand at a

point even with the roof railing with an upward speed of 15.0 m/s; the ball is then in free fall. On its

way back down, it just misses the railing. Find (a) the ball’s position and velocity 1.00 s and 4.00 s

after leaving your hand; (b) the ball’s velocity when it is 5.00 m above the railing; (c) the maximum

height reached; (d) the ball’s acceleration when it is at its maximum height.


1
Expert's answer
2021-10-31T18:16:00-0400

a)

h=vtgt22,h=vt-\frac{gt^2}2,

h1=155=10 m,h_1=15-5=10~m,

h4=6080=20 m,h_4=60-80=-20~m,

v=v0gt,v=v_0-gt,

v1=1510=5 ms,v_1=15-10=5~\frac ms,

v4=1540=25 ms,v_4=15-40=-25~\frac ms,

b)

v=±2gh=±10 ms,v=±\sqrt{2gh}=±10~\frac ms,

c)

hmax=v22g=11.3 m,h_{max}=\frac{v^2}{2g}=11.3~m,

d)

a(hmax)=g=10 ms2.a(h_{max})=g=10~\frac m{s^2}.


Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!
LATEST TUTORIALS
APPROVED BY CLIENTS