Saturday

January 31, 2015

January 31, 2015

Posted by **Nami** on Friday, September 28, 2012 at 10:52am.

What is the height of the cliff?

What is the maximum height of the ball?

What is the ball's impact speed?

Please provide the Formulas and steps!

Thank You!

- Physics -
**Henry**, Saturday, September 29, 2012 at 9:11pmVo = 27m/s @ 60o

Xo = 27*cos60 = 13.5 m/s.

Yo = 27*sin60 = 23.4 m/s.

Tr = (Y-Yo)/g = (0-23.4)/-9.8 = 2.39 s.=

Rise time.

hmax = Yo*t + 0.5g*t^2.

hmax = 23.4*2.39 - 4.9*(2.39)^2=27.84 m.

Tr + Tf = 3.0 s.

2.39 + Tf = 3

Tf = 3 - 2.39 = 0.61 s. = Fall time.

h = hmax - 0.5g*Tf^2.

h = 27.84 - 4.9*(0.61)^2 = 23.3 = Ht. of cliff.

V = Vo + gt = 0 + 9.8*0.61 = 5.98 m/s.=

Impact velocity of ball.

**Answer this Question**

**Related Questions**

physic - A ball is thrown toward a cliff of height h with a speed of 28m/s and ...

Physic - A ball is thrown toward a cliff of height h with a speed of 28m/s and ...

physic - A ball is thrown toward a cliff of height h with a speed of 28m/s and ...

physic - A ball is thrown toward a cliff of height h with a speed of 28m/s and ...

physics - Three identical balls are thrown from a cliff of height, h, above a ...

physics - Three identical balls are thrown from a cliff of height, h, above a ...

physics. - a ball is thrown upward with an initial velocity of 38.9 m/s from the...

physics - A football is thrown from the edge of a cliff from a height of 22 m at...

physics - A ball is thrown from a cliff upward with a speed of 21 m/s and at an ...

Physics - A ball is thrown from a cliff upward with a speed of 27 m/s and at an ...