Monday

April 21, 2014

April 21, 2014

Posted by **Daniella** on Thursday, December 8, 2011 at 6:58pm.

a) what is the highest point from the top of the cliff that he reaches before the laws of physics catch up with him and start bringing him back down to Earth?

b)What is his velocity at that point?

c)If the cliff is 10m high, how long is he in the air before he comes crashing down to the nice, soft, sandy beach below the cliff?

d)what is his final velocity?

e)what is his final horizontal displacement from the cliff?

- Physics -
**Henry**, Saturday, December 10, 2011 at 8:18pmVo = 14.5m/s @ 50 Deg.

Xo = 14.5cos50 = 9.32 m/s.

Yo = 14.5sin50 = 11.1 m/s.

a. Yf^2 = Yo^2 + 2g*h,

h = (Yf^2 - Yo^2) / 2g,

h = (0 - ( 11.1)^2) / -19.6 = 6.29 m.

b. V = Vf = 0 = Final Velocity.

c. d = Vo*t + 0.5g*t^2 = 6.29+10.

0 + 4.9t^2 = 16.29,

t^2 = 3.32,

t = Tf = 1.82 sw. = Fall time.

d. Vf^2 = Vo^2 + 2g*d,

Vf^2 = 0 + 19.6*16.29 = 319.28,

Vf = 17.9 m/s.

e. Tr = (Vf - Vo) / g,

Tr = (0 - 11.1) / -9.8 = 1.13 s. = Rise

time or time to reach max ht.

Tr + Tf = Time in flight.

Dx = Xo * (Tr+Tf),

Dx = 9.32 m/s * (1.13+1.82)s = 27.5 m.

- Physics -
**Henry**, Saturday, December 10, 2011 at 8:23pmpost it.

**Related Questions**

Physics - Augustine continues to run around. He gets to the park and has the ...

Physics w/c - After having collected samples along the shore all day long, a ...

Physics - After having collected samples along the shore all day long, a marine ...

Algebra - At a local park, there is a large circular fountain feature that is 50...

Algebra - At a local park, there is a large circular fountain feature that is 50...

physics - a jogger run around a square city block with sides of 30m. if she ...

Math - A circular path around a lake has a diameter of 2,000 feet (ft). Pranotti...

Physics - It takes you 13.5 minutes to run 8 full laps around a 400m track. Find...

algebra - Jennifer is on her daily run. After 25 minutes she has gone 1.5 miles...

math - Isabel took 20 minutes to run around the track six times. John took 3 ...