Saturday

November 22, 2014

November 22, 2014

Posted by **Anonymous** on Friday, February 1, 2013 at 8:10pm.

- physics -
**Henry**, Sunday, February 3, 2013 at 8:29pmV^2 = Vo^2 + 2g*d.

Vo^2 = V^2--2g*d

Vo^2 = 0 - (-19.6)*20.6 = 403.76

Vo = 20.1 m/s. = Initial velocity.

V = Vo + g*t.

Tr = (V-Vo)/g = (0-20.1)/-9.8 = 2.05 s.

= Rise time.

Tr + Tf = 6.54 s.

2.05 + Tf = 6.54

Tf = 6.54 - 2.05 = 4.49 s. = Fall time

from 20.6 m above the cliff to Gnd.

Vo*t + 0.5g*t^2 = 20.6 + h.

0 + 4.9t^2 = 20.6 + h

h = 4.9*(4.49)^2 - 20.6 = 78.2 m.

**Answer this Question**

**Related Questions**

physics - A rock is thrown vertically upward from the edge of a cliff. The rock ...

Physics - The rock reaches a maximum height of 20.4 m above the top of the cliff...

physics - c) A 0.26-kg rock is thrown vertically upward from the top of a cliff ...

physics - A 0.26 kg rock is thrown vertically upward from the top of a cliff ...

physics..help PLEASE! - A 0.26 kg rock is thrown vertically upward from the top ...

PHYSICS - A 0.26kg- rock is thrown vertically upward from the top of a cliff ...

physics - A rock is thrown upwards from the top of a 100m cliff, on the way down...

Physics - A boy kicks a rock off a cliff with a speed of 19.4 m/s at an angle of...

Math - A person standing near the edge of a cliff 120 feet above a lake throws a...

physics - A rock is thrown from a cliff top at 18m/s, 25 degrees above the ...